Portuguese has an exceptionally productive word-formation system (formação de palavras), inherited from Latin and continuously enriched through the history of the language. When Portuguese needs a new word — for a new technology, a new profession, a new sensation — it rarely borrows. Much more often it builds the word from material it already has, using a small inventory of prefixes, suffixes, and composition patterns that are still fully alive today. A speaker who learns these patterns stops memorising vocabulary item by item and starts predicting words.
This page is the navigator for the word-formation group. It gives you the big picture: the mechanisms Portuguese uses to create new words, the orthographic rules that govern their spelling under the Acordo Ortográfico 1990, and the points where word formation in Portuguese diverges from English. Each section links to a dedicated page where the mechanism is worked through with full examples.
The two main mechanisms
Portuguese creates new words in two main ways: by derivation (derivação) and by composition (composição). Derivation adds affixes — prefixes or suffixes — to an existing stem. Composition combines two or more full words, or word-roots, into a single new word. Both are productive today, and both obey well-defined rules.
A third, smaller mechanism is conversion (conversão or derivação imprópria), where the same form is used as a different part of speech without any affixation. English speakers will recognise this from pairs like run (verb) / run (noun); Portuguese has it too, though less extensively.
1. Derivation (derivação)
Prefixation
Adding a prefix to the front of a stem. The stem does not usually change its word class — a verb stays a verb, an adjective stays an adjective — but the meaning shifts.
fazer (to do, make) → desfazer (to undo)
the prefix *des-* expresses reversal
contente (happy) → descontente (unhappy)
the prefix *des-* expresses negation
ler (to read) → reler (to reread)
the prefix *re-* expresses repetition
ver (to see) → prever (to foresee)
the prefix *pre-* (from Latin prae-) expresses anteriority
cozer (to cook, sew) → cozedura, pré-cozer (to pre-cook)
the prefix *pré-* attaches to modern verbs to form anterior aspect
The inventory of productive prefixes in PT-PT is covered in depth on the common prefixes page, which also gives the Acordo Ortográfico 1990 hyphenation rules that apply when prefix and stem meet.
Suffixation
Adding a suffix to the end of a stem. Suffixes do much more than prefixes: they regularly change the word class of the stem. A verb becomes a noun, a noun becomes an adjective, an adjective becomes an adverb. This is where most of Portuguese vocabulary-building happens.
| Type | Pattern | Example |
|---|---|---|
| Verb → Noun (action/result) | verb + -ção / -mento | criar → criação; tratar → tratamento |
| Adjective → Noun (abstract) | adjective + -dade / -eza / -ura | feliz → felicidade; triste → tristeza; amargo → amargura |
| Noun → Adjective (quality) | noun + -oso / -al | medo → medoso; nação → nacional |
| Verb → Adjective (possibility) | verb + -vel / -ável / -ível | amar → amável; fazer → factível |
| Adjective → Adverb | adjective + -mente | rápido → rapidamente |
| Verb → Agent noun | verb + -dor / -tor | trabalhar → trabalhador; conduzir → condutor |
Este tratamento é caríssimo, mas a recuperação foi incrível.
This treatment is very expensive, but the recovery was incredible.
A felicidade não se compra, diz o ditado.
Happiness cannot be bought, as the saying goes.
O senhor é muito amável, obrigado.
You are very kind, thank you.
Each of these suffix families has its own dedicated page — noun-forming suffixes, adjective-forming suffixes, and adverb formation with -mente — with the full list of patterns and their register notes.
Parasynthesis
A subtler form of derivation where a prefix and a suffix are added simultaneously, neither of them productive alone on the same stem. The prefix + suffix together convert the stem into a new word.
barco (boat) → embarcar (to embark)
prefix *em-* and suffix *-ar* added together; neither *embarco* nor *barcar* exists as a verb
garrafa (bottle) → engarrafar (to bottle)
prefix *en-* + suffix *-ar* form a verb from a noun
velho (old) → envelhecer (to grow old)
prefix *en-* + suffix *-ecer* form an inchoative verb from an adjective
mudo (silent) → emudecer (to fall silent)
same pattern: prefix *e-* (from *en-*) + *-ecer*
caro (dear) → encarecer (to become more expensive)
parasynthesis produces an inchoative verb
Parasynthesis is not a mechanism you apply spontaneously when learning vocabulary, but it is a mechanism you should recognise: a huge class of inchoative verbs in -ecer (amadurecer, empobrecer, enriquecer, entristecer, engrossar) are built this way.
Regressive derivation (derivação regressiva)
The opposite of suffixation: the word-final material of a verb is chopped off to form a noun. The result is a short, often monosyllabic noun that denotes the action or its object/result.
| Verb | Noun | Meaning |
|---|---|---|
| trabalhar | o trabalho | work |
| pescar | a pesca | fishing, the catch |
| cantar | o canto | song, singing |
| chorar | o choro | crying, weeping |
| cheirar | o cheiro | smell |
| ganhar | o ganho | gain, earnings |
| gastar | o gasto | expense |
| falar | a fala | speech |
| abrigar | o abrigo | shelter |
O trabalho começa sempre à segunda-feira às nove.
Work always begins on Monday at nine.
O choro da criança acordou a casa toda.
The child's crying woke up the whole house.
O gasto mensal em transportes subiu bastante.
The monthly expense on transport has risen considerably.
Regressive derivation is not predictable — not every verb has a regressively derived noun — but when it occurs it produces some of the most frequent words in the language.
2. Composition (composição)
While derivation adds affixes, composition combines two or more full words or roots. Portuguese composition is less productive than English — Portuguese does not freely stack nouns the way English does (coffee table, science fiction editor) — but it has two distinct mechanisms worth naming.
Juxtaposition (justaposição)
Two words are written side by side, usually joined by a hyphen. Each word keeps its own spelling and, where relevant, its own accent. The hyphen is the visible mark of the composition.
| Compound | Components | Meaning |
|---|---|---|
| guarda-chuva | guardar (to keep) + chuva (rain) | umbrella |
| porta-voz | portar (to carry) + voz (voice) | spokesperson |
| couve-flor | couve (cabbage) + flor (flower) | cauliflower |
| pé-de-meia | pé (foot) + de + meia (stocking) | nest egg, savings |
| sexta-feira | sexta (sixth) + feira (day, market) | Friday |
| vaivém | vai (goes) + vem (comes) | toing and froing (written solid) |
| bem-disposto | bem (well) + disposto (disposed) | cheerful |
| mal-educado | mal (badly) + educado (raised) | rude, ill-mannered |
Esqueci-me do guarda-chuva e apanhei uma molha valente.
I forgot my umbrella and got thoroughly drenched.
O porta-voz do governo falou durante uma hora sem dizer nada.
The government spokesperson spoke for an hour without saying anything.
Na sexta-feira à noite gostamos de ir ao cinema.
On Friday evening we like to go to the cinema.
Agglutination (aglutinação)
The components fuse into a single word, often with phonetic changes or loss of material. The fusion is complete: the components are no longer visible to a naive speaker, and the compound is written solid without a hyphen.
| Compound | Components | Meaning |
|---|---|---|
| vinagre | vinho + acre (sour wine) | vinegar |
| aguardente | água + ardente (burning water) | spirits, firewater |
| fidalgo | filho + de + algo (son of something) | nobleman |
| embora | em + boa + hora (in a good hour) | though, although / away |
| outrora | outra + hora (another hour) | in times past, formerly |
| algures | al(gum) + (lu)gares (some places) | somewhere |
| alhures | al(gum) + lugares | elsewhere (literary) |
Esta aguardente é feita tradicionalmente em Lamego.
This spirit is traditionally made in Lamego.
Outrora, aqui havia um mosteiro imponente.
In times past, there was an imposing monastery here.
Agglutination is a historical mechanism. It is not productive today — you cannot create a new agglutinative compound — but dozens of everyday words were formed this way, and knowing the original components often lights up the meaning.
3. Conversion (derivação imprópria)
Portuguese lets the same form function as different parts of speech without changing shape. The classic case is the infinitive used as a noun: o jantar (the dinner), o cantar (the singing), o andar (the floor, the walking). The definite article + infinitive yields a noun meaning "the action of V-ing."
O jantar está pronto, podem vir à mesa.
Dinner is ready, you can come to the table.
Ela vive no terceiro andar do prédio.
She lives on the third floor of the building.
O cantar das andorinhas acordou-me cedo.
The swallows' singing woke me up early.
O ser humano distingue-se dos outros animais pelo uso da linguagem.
The human being is distinguished from other animals by the use of language.
Other conversion patterns:
- Adjective used as noun: o jovem (the young man), a velha (the old woman), um pobre (a poor man). The article forces a nominal reading.
- Interrogative used as noun: o porquê (the why, the reason). Gostava de saber o porquê do teu silêncio. — "I would like to know the reason for your silence."
- Participle used as adjective or noun: os casados (married people), os licenciados (graduates).
See nominalization from adjectives and nominalization from verbs for the full treatment.
4. Reduplication
Reduplication — repeating all or part of a word — is only marginally productive in Portuguese, mostly for onomatopoeia and child-language. Words like tique-taque (tick-tock), zás-trás (bang-crash), lenga-lenga (rigmarole, nag), nhoque-nhoque (pejorative for whining) belong here, but you will not build a new word this way.
Aquele relógio antigo faz tique-taque o dia todo.
That old clock goes tick-tock all day long.
Chega de lenga-lenga, quero uma resposta direta.
Enough rigmarole, I want a direct answer.
5. Semantic derivation
A word keeps its shape but acquires a new sense — often through metaphor. This is technically not word formation, but it is how the Portuguese lexicon grows without visible morphology.
| Word | Original sense | Extended sense |
|---|---|---|
| boca | mouth | mouth (of a river, cave, jar) |
| pé | foot | foot of a page, foot of a mountain |
| cabeça | head | head (of a department, of cattle) |
| braço | arm | arm (of the sea, of a chair) |
| coração | heart | heart, centre (of the city) |
| ratinho | little mouse | computer mouse |
A boca do rio está cheia de pescadores esta manhã.
The river mouth is full of fishermen this morning.
Vive no coração de Lisboa, mesmo ao lado do Chiado.
He lives in the heart of Lisbon, right next to Chiado.
Productivity today
Not every affix is still in use. Some are productive — a Portuguese speaker can coin a new word with them right now and be understood. Others are frozen — they appear in existing words but no new coinages are formed.
| Productive today | Used in new coinages |
|---|---|
| -mente | rapidamente, digitalmente, virtualmente |
| -dor / -dora | empreendedor, influenciador |
| -ismo | capitalismo, digitalismo, extrativismo |
| -ista | ativista, podcaster (still rare as -ista) |
| des- | desinfluenciar, desabonar |
| re- | reescrever, reinventar |
| ciber- (new!) | cibersegurança, ciberataque |
| Frozen | Only in historical words |
|---|---|
| con- | consentir, consolar (from Latin) |
| in- (as "into") | incluir, infiltrar (from Latin) |
| -ume | costume, azedume |
| -dão | mansidão, solidão (older abstracts) |
A good test for productivity: if you coin a nonce word with the affix, would a Portuguese speaker understand it? Desinfluenciar is a word people coin and understand; connmobilizar sounds like nothing.
Orthographic rules of affixation
When a prefix meets a stem, three things can happen: they can be written solid (reler), with a hyphen (anti-herói), or with a doubled vowel (reeleger). The Acordo Ortográfico 1990 (AO90) clarified and in some cases changed these rules. Since Portugal adopted AO90 in 2009 (with full implementation from 2015), the contemporary rules are:
Doubling of vowels
When the prefix ends in a vowel and the stem begins with the same vowel, the two vowels are both written (they do not merge, and they are not separated by a hyphen):
re- + eleger = reeleger
to re-elect — two e's written out
contra- + atacar = contra-atacar
to counter-attack — note: *contra-* + stem beginning with *a* keeps the hyphen in AO90
The AO90 rule: same vowel with hyphen for prefixes ending in the same vowel as the stem begins with, except for the prefix co- which usually merges (cooperar, coordenar).
Hyphenation rules under AO90
The general AO90 principle: use a hyphen when the stem begins with the same letter as the prefix ends with, or with h. Use no hyphen otherwise.
| Prefix | Before | Rule | Example |
|---|---|---|---|
| anti- | h, i | hyphen | anti-higiénico, anti-inflamatório |
| anti- | other | no hyphen | antibiótico, antidroga |
| super- | h, r | hyphen | super-herói, super-resistente |
| super- | other | no hyphen | superdotado, supermercado |
| sub- | b, h, r | hyphen | sub-base, sub-humano, sub-região |
| auto- | h, o | hyphen | auto-hipnose, auto-observação |
| auto- | other | no hyphen | autoestrada (AO90), autocarro, autoajuda |
| co- | h, usually hyphen | hyphen | co-herdeiro |
| co- | other | no hyphen | cooperar, coautor, coexistir |
| ex- (former) | always hyphen | hyphen | ex-presidente, ex-marido |
The common prefixes page walks through these rules prefix by prefix, with AO90 changes flagged where they matter.
AO90 changes that affect word formation
The Acordo Ortográfico 1990 changed a number of PT-PT spellings in ways that affect word-formation patterns. The most visible changes:
- Silent consonants dropped: acção → ação, excepcional → excecional, óptimo → ótimo, adoptar → adotar, director → diretor. This affects every suffix that fuses with a dropped consonant.
- Hyphen simplifications: auto-estrada → autoestrada, fim-de-semana → fim de semana (now written as three words, not hyphenated).
- Silent p: egípcio, egiptologia kept (not silent); baptismo → batismo (silent p dropped).
Many older texts — books published before 2009 — will use the pre-AO90 spelling. Both forms are intelligible, but for any formal writing today the AO90 form is expected.
Contrast with other Romance languages
Portuguese shares most of its word-formation mechanisms with Spanish, Italian, and French — this is the common Romance inheritance. But PT-PT has a few distinctive traits:
- Productivity of -ada for collectives: a malandrada (the group of rascals), a rapaziada (the group of young men), a patuscada (a feast-like gathering). Spanish has some of this (muchachada) but PT-PT uses it more readily.
- Affective diminutives in -inho that go beyond smallness: um cafezinho can be a gesture of friendship, not a small coffee. See diminutives.
- Preference for -mente over alternatives: PT-PT uses -mente adverbs more readily than French uses -ment or Italian uses -mente, and much more than English uses -ly in conversation.
- Parasynthetic -ecer inchoatives: enriquecer, empobrecer, envelhecer, amadurecer. Spanish prefers enriquecerse, empobrecerse; Italian does not use -ecere this way. Portuguese has a dense inventory.
Where to go next
This overview has named every mechanism Portuguese uses to build words. The dedicated pages walk each mechanism through in depth:
- Common prefixes — the productive prefix inventory and AO90 hyphenation rules
- Noun-forming suffixes — -ção, -mento, -dade, -eza, -ura, -ismo, -ista, -dor, -eiro, -ário, -ada, -agem, -ice, and more
- Adjective-forming suffixes — -oso, -vel/-ável/-ível, -al, -ivo, -ário, -udo, -onho, -esco
- Forming adverbs with -mente — the feminine-adjective rule, the accent loss, the list trick
- Compound nouns — hyphenated compounds, their pluralization, and the AO90 changes
- Diminutives — -inho / -zinho and their affective force
- Augmentatives — -ão, -ona, -aço and their semantic nuances
Common mistakes
❌ felizmento
*-mente* adverbs are built on the feminine singular of the adjective, not the masculine. *Feliz* is invariable for gender, but *-mente* never becomes *-mento*.
✅ felizmente
happily, fortunately
❌ reeescrever
The prefix *re-* only adds one *e* to an *e*-initial stem. *Reescrever*, not *reeescrever*.
✅ reescrever
to rewrite
❌ antihumano, antieroi
Under AO90, *anti-* takes a hyphen before a stem beginning with *h* or *i*. *Anti-humano, anti-herói*.
✅ anti-humano, anti-herói
anti-human, anti-hero
❌ autoestradas (pre-2009 spelling)
Under AO90, *auto-* merges with most stems: *autoestrada*. Before a vowel *o*, there would be a hyphen (*auto-observação*).
✅ autoestrada (singular), autoestradas (plural)
highway, motorway
❌ feliciidade
The suffix *-idade* replaces the final vowel of the adjective stem. *Feliz + -idade = felicidade*, with z → c before i.
✅ felicidade
happiness
Key takeaways
- Portuguese builds new words by derivation (prefix + stem, stem + suffix, or both at once) and composition (combining two words or roots).
- Derivation is the workhorse. Suffixes change word class: verb → noun (-ção, -mento), adjective → noun (-dade, -eza), noun → adjective (-oso, -al), verb → adjective (-vel, -ível).
- Parasynthesis — simultaneous prefix + suffix — builds a dense class of inchoative verbs in -ecer: amadurecer, empobrecer, enriquecer.
- Composition is less productive than English. PT-PT compounds are usually hyphenated (guarda-chuva) or historically agglutinated (vinagre).
- Conversion lets the same form function as different parts of speech: o jantar (noun from infinitive), o pobre (noun from adjective).
- The Acordo Ortográfico 1990 simplified hyphenation: autoestrada, coautor (no hyphen), but anti-herói, super-herói (hyphen before h), ex-presidente (always hyphen).
- Not every affix is productive. -mente, -dor, -ismo, des-, re-, ciber- are still used for new coinages; older Latinate affixes (con-, -ume) are frozen in their existing words.
- Portuguese word formation is dense enough that a learner who masters a handful of suffixes can predict hundreds of new words rather than learning each one.
Related Topics
- Common PrefixesB1 — The productive prefixes of European Portuguese — what they mean, what they attach to, and the Acordo Ortográfico 1990 rules that govern their hyphenation.
- Noun-Forming SuffixesB1 — The productive suffixes European Portuguese uses to build nouns — action, abstract quality, agent, collective, place, and evaluative — with the register and gender notes each one carries.
- Adjective-Forming SuffixesB1 — The productive suffixes European Portuguese uses to build adjectives from nouns, verbs, and other adjectives — what each suffix means, what it attaches to, and the register notes that go with it.
- Compound Nouns and Their PluralsB1 — How Portuguese compound nouns are formed and how to pluralise them — noun-noun, noun-adjective, noun-preposition-noun, verb-noun, and invariable compounds.
- Diminutives (-inho/-inha, -zinho/-zinha)A2 — How to form Portuguese diminutives and use them for size, affection, politeness, softening, and irony — one of the most characteristic features of spoken Portuguese.
- Augmentatives (-ão/-ona, -aço)B1 — Portuguese augmentative suffixes for largeness, emphasis, affection, and pejorative force — and why -ão words all become masculine morphologically.
- Forming Adverbs with -menteA2 — How to build manner adverbs from adjectives in Portuguese — the feminine-adjective rule, accent loss, the list trick, and the -mente words that do not mean what you think.