Once you know a few hundred Portuguese nouns and verbs, you can recognize — and often guess — thousands of adjectives, because Portuguese builds adjectives from those roots using a small set of highly productive suffixes. Each suffix carries a meaning: -oso says "full of," -ável says "able to be," -udo says "having a big _" (and usually mocks it). Learning the suffixes turns vocabulary from a list to be memorized into a system to be decoded. This page maps the main adjective-forming suffixes, what each one signals, and how to read an unfamiliar adjective from its ending.
Why suffixes matter
English has the same machinery — -ous (famous), -able (readable), -al (national), -y (sleepy) — and a literate English speaker reads them automatically. Portuguese suffixes line up surprisingly well with English ones, which is good news: -oso often maps to -ous, -ável/-ível to -able/-ible, -al to -al, -ico to -ic/-ical. The payoff is that the suffix tells you the adjective's flavor even when the root is new to you.
The major suffixes
| Suffix | Core meaning | Built from | Examples |
|---|---|---|---|
| -oso / -osa | full of, characterized by | noun | medo → medroso; cuidado → cuidadoso; gosto → gostoso |
| -al | relating to | noun | nação → nacional; cultura → cultural; centro → central |
| -ável / -ível | able to be ___ed | verb | amar → amável; comer → comível; possível |
| -ico / -ica | relating to, of the nature of | noun | economia → econômico; história → histórico |
| -ano / -ana | belonging to, originating in | noun | América → americano; aldeia → aldeão; Roma → romano |
| -ento / -enta | full of (often unpleasant) | noun | violência → violento; ciúme → ciumento; poeira → poeirento |
| -udo / -uda | having a big/notable _ (often pejorative) | noun | barriga → barrigudo; cabelo → cabeludo |
| -esco / -esca | in the manner/style of | noun | gigante → gigantesco; Dante → dantesco |
| -il | relating to, prone to | noun | febre → febril; infante → infantil |
-oso / -osa — "full of"
The workhorse. Attaches to a noun and means "having lots of / characterized by" that noun. It maps almost perfectly to English -ous and -y.
Ele é muito cuidadoso com as plantas do jardim.
He's very careful with the garden plants. (cuidado → cuidadoso)
O cachorro é medroso e se esconde no trovão.
The dog is timid and hides during thunder. (medo → medroso)
Esse bolo de cenoura está gostoso demais!
This carrot cake is way too delicious! (gosto → gostoso)
-ável / -ível — "-able / -ible"
Built from verbs and meaning "able to be [verb]ed" — exactly like English -able/-ible. -ável attaches to -ar verbs (lavar → lavável); -ível to -er/-ir verbs (ler → legível, vender → vendível). It is one of the most productive patterns in the language: you can coin clicável (clickable), baixável (downloadable) and be understood.
Essa jaqueta é lavável na máquina.
This jacket is machine-washable. (lavar → lavável)
É perfeitamente possível terminar isso hoje.
It's perfectly possible to finish this today. (poder → possível)
A letra dele é quase ilegível.
His handwriting is almost illegible. (ler → legível, with negative i-)
Note the negative prefix in-/i- that pairs naturally with these: aceitável → inaceitável, possível → impossível, legível → ilegível — mirroring English un-/in-/il-.
-al and -ico — "relating to"
These two build relational adjectives — they don't describe a quality so much as link the noun to a domain. -al (= English -al) is the more neutral: cultura → cultural, centro → central, nação → nacional. -ico (= English -ic/-ical) is common in learned and technical vocabulary, and watch the accent — many take a circumflex or acute: econômico, histórico, prático, lógico.
O feriado é uma data nacional muito importante.
The holiday is a very important national date.
Do ponto de vista econômico, a decisão faz sentido.
From an economic standpoint, the decision makes sense. (academic)
-ento — "full of," with a downbeat tone
Like -oso it means "full of," but it leans toward the unpleasant or messy: poeirento (dusty), lamacento (muddy), nojento (disgusting), ciumento (jealous), violento (violent).
O caminho estava lamacento depois da chuva.
The path was muddy after the rain. (lama → lamacento)
Ele fica ciumento quando ela sai com os amigos.
He gets jealous when she goes out with friends. (ciúme → ciumento)
-udo — "having a big _," often mocking
A distinctly expressive Brazilian suffix meaning "endowed with a notable/large [noun]," almost always applied to body parts and almost always pejorative, teasing, or blunt (informal). Barrigudo (pot-bellied, from barriga), cabeludo (long-haired/hairy, from cabelo), narigudo (big-nosed), dentuço/dentudo (with big teeth), peludo (very hairy).
Desde que parou de treinar, ficou meio barrigudo.
Since he stopped working out, he's gotten a bit pot-bellied. (informal)
Que cachorro cabeludo e fofo!
What a hairy, cute dog! (informal)
-esco and -il — style and tendency
-esco means "in the style/manner of" — gigantesco (gigantic, gigante-like), grotesco, novelesco (soap-opera-ish), carnavalesco (carnival-style). -il (= English -ile) means "relating to / prone to": febril (feverish, from febre), infantil (childish/children's, from infante), juvenil (youthful). Note that -il adjectives are invariable for gender and stress varies — fácil and difícil stress the first syllable (and carry an accent), while febril, infantil, juvenil are oxytone (stressed on the -il, no accent).
Foi um esforço gigantesco para terminar a obra a tempo.
It was a gigantic effort to finish the building on time. (gigante → gigantesco)
Ele passou a noite com um estado febril.
He spent the night in a feverish state. (febre → febril)
Suffixes feed two-way derivation
These suffixes don't only build adjectives from nouns — the relationship runs both ways. From the adjective you can build back to an abstract noun (see nouns/abstract-nouns): feliz → felicidade, bonito → beleza, cuidadoso → cuidado. And an adjective can be nominalized directly — o gostoso, os medrosos (see adjectives/adjective-nominalization). The -nte present-participle adjectives (covered in adjectives/present-participle-as-adjective) are a related word-formation family, built off verbs rather than nouns.
Common Mistakes
❌ Essa jaqueta é lavabel.
Incorrect — the Portuguese suffix is -ável, not the English -able spelling.
✅ Essa jaqueta é lavável.
This jacket is washable.
❌ Uma decisão economica.
Incorrect — -ico adjectives often carry an accent: econômico.
✅ Uma decisão econômica.
An economic decision.
❌ Ele é uma pessoa medrosa... medroso?
Confusion — these suffixed adjectives still agree: a woman is medrosa, a man medroso.
✅ Ela é medrosa; ele é medroso.
She is timid; he is timid.
❌ É impossivel terminar hoje.
Incorrect — -ível takes an accent on the í: impossível.
✅ É impossível terminar hoje.
It's impossible to finish today.
❌ A criança está com febre, está febrila.
Incorrect — -il adjectives are invariable for gender: febril.
✅ A criança está febril.
The child is feverish.
Key Takeaways
- Portuguese builds adjectives productively with suffixes that each carry meaning: -oso ("full of"), -ável/-ível ("-able/-ible"), -al/-ico ("relating to"), -ento ("full of," negative), -udo ("big _," pejorative), -esco ("in the style of"), -il ("prone to").
- Many map directly onto English suffixes, so stripping the suffix and reading the root lets you decode unfamiliar words.
- Mind the accents: -ico and -ível adjectives frequently take written accents (histórico, possível).
- -udo is expressive, body-focused, and informal/pejorative — use with care.
- -il adjectives are invariable for gender (febril, infantil).
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Start learning Portuguese→Related Topics
- Adjective NominalizationB1 — How Brazilian Portuguese turns adjectives into nouns with just an article — 'o difícil' (the hard part), 'os ricos' (the rich), 'a loira' (the blonde woman).
- Abstract Nouns and Their FormationB1 — The predictable, mostly-feminine suffix set Brazilian Portuguese uses to build abstract nouns — -dade, -ção, -eza, -mento, -ência and more.
- Adjectives: OverviewA1 — How Brazilian Portuguese adjectives work — they agree with the noun in gender and number and usually follow it, the mirror image of English's invariable pre-nominal adjective.
- Gender AgreementA1 — How Portuguese adjectives change form to match the masculine or feminine gender of the noun they describe — and which ones don't change at all.
- Present Participle as AdjectiveB2 — The -nte adjectives of Portuguese — descended from the Latin present participle, gender-invariable, and not to be confused with the verbal gerund in -ndo.