In Portuguese, an adjective is not a fixed word — it dresses itself to match the noun it describes. If the noun is feminine, the adjective puts on a feminine ending; if masculine, a masculine one. English speakers have nothing like this: "tall" is "tall" whether it describes a man or a woman. This page covers gender agreement specifically — how adjectives shift between masculine and feminine — and, just as importantly, which adjectives stay the same no matter what.
The core mechanism: the noun decides
Adjectives do not have an inherent gender. They borrow it from the noun. The noun is the boss; the adjective copies it. This is the single most important idea on this page, and it is the opposite of how English works, where adjectives never inflect at all.
um carro novo
a new car (carro is masculine → novo)
uma casa nova
a new house (casa is feminine → nova)
Notice that you cannot decide the adjective's ending until you know the noun's gender. Learning gender with every noun (see nouns/gender-basics) is therefore not optional — it directly determines your adjective endings.
Pattern 1: adjectives ending in -o → -a
This is the largest and most regular group. Adjectives whose masculine form ends in -o swap that -o for -a in the feminine. This covers a huge share of everyday descriptive words.
| Masculine | Feminine | Meaning |
|---|---|---|
| bonito | bonita | pretty, good-looking |
| novo | nova | new |
| alto | alta | tall |
| baixo | baixa | short (height) |
| magro | magra | thin |
| caro | cara | expensive |
Esse vestido é muito caro, mas é lindo.
That dress is very expensive, but it's beautiful.
Meu irmão é alto e minha irmã também é alta.
My brother is tall and my sister is also tall.
Pattern 2: the invariable adjectives (this is the surprise)
Here is where English speakers go wrong by overgeneralizing. Not every adjective changes. Adjectives that end in -e or in a consonant are usually invariable for gender — the masculine and feminine forms are identical.
| Ending | Adjective | Masc. example | Fem. example |
|---|---|---|---|
| -e | inteligente | um homem inteligente | uma mulher inteligente |
| -e | grande | um prédio grande | uma sala grande |
| -e | triste | um filme triste | uma história triste |
| -z | feliz | um menino feliz | uma menina feliz |
| -l | azul | um céu azul | uma camisa azul |
| -l | fácil | um teste fácil | uma prova fácil |
| -m | comum | um erro comum | uma dúvida comum |
Ela é uma profissional muito competente.
She is a very competent professional.
O céu está azul e o mar também está azul hoje.
The sky is blue and the sea is blue today too.
So there is no "azula," no "feliza," no "inteligenta." These would all be errors. The mental model to build: only certain endings carry a feminine marker; -e and most consonant endings do not.
Pattern 3: -or → -ora (but watch the comparatives)
Adjectives ending in -or add -a for the feminine: trabalhador → trabalhadora. This is regular for descriptive adjectives.
Meu avô era muito trabalhador e minha avó era trabalhadora também.
My grandfather was very hard-working and my grandmother was hard-working too.
Ela é uma pessoa encantadora.
She is a charming person.
The exception: the comparative forms melhor (better), pior (worse), maior (bigger), and menor (smaller) are invariable for gender. They came into Portuguese as comparatives and never developed a separate feminine.
Esta é a melhor padaria da cidade.
This is the best bakery in town. (padaria is feminine — still 'melhor', not 'melhora')
A situação ficou pior depois da chuva.
The situation got worse after the rain.
Be careful: melhora does exist, but it is a noun ("an improvement") or a verb form, never the feminine of "melhor."
Pattern 4: -ês → -esa
Adjectives ending in -ês, mostly nationalities and origins, form the feminine in -esa (and lose the accent, because the vowel is no longer stressed at the end).
| Masculine | Feminine | Meaning |
|---|---|---|
| português | portuguesa | Portuguese |
| francês | francesa | French |
| inglês | inglesa | English |
| holandês | holandesa | Dutch |
Ele é português e a esposa dele é portuguesa.
He is Portuguese and his wife is Portuguese.
A culinária francesa é muito refinada.
French cuisine is very refined.
Note the accent drops: português (stressed -ês needs the circumflex) but portuguesa (stress falls naturally, no accent needed).
Pattern 5: -ão → -ã or -ona
Adjectives ending in -ão split into two behaviors depending on the word:
- Most descriptive/origin adjectives: -ão → -ã: alemão → alemã, cristão → cristã, são → sã.
- Augmentative-flavored or "character trait" adjectives: -ão → -ona: chorão → chorona (crybaby), brincalhão → brincalhona (playful), comilão → comilona (gluttonous).
Meu colega é alemão e a namorada dele é alemã.
My colleague is German and his girlfriend is German.
O meu sobrinho é muito chorão, mas a irmã dele é mais chorona ainda.
My nephew is a real crybaby, but his sister is even more of a crybaby.
There is no shortcut that tells you which -ão goes to -ã versus -ona — you learn it word by word. The -ona group has a slightly (informal) or affectionate ring to it.
Pattern 6: -u → -ua
A small group ending in stressed -u adds -a: cru → crua (raw), nu → nua (naked, bare).
Não como carne crua, mas adoro peixe cru no sushi.
I don't eat raw meat, but I love raw fish in sushi.
Quick reference: who changes, who doesn't
| Masculine ending | Feminine | Changes? |
|---|---|---|
| -o (bonito) | -a (bonita) | Yes |
| -or (trabalhador) | -ora (trabalhadora) | Yes |
| -ês (português) | -esa (portuguesa) | Yes |
| -ão (alemão) | -ã / -ona | Yes |
| -u (cru) | -ua (crua) | Yes |
| -e (inteligente) | same | No |
| consonant (feliz, azul, comum) | same | No |
| comparatives (melhor, pior, maior) | same | No |
Common Mistakes
❌ uma mulher inteligenta
Incorrect — 'inteligente' ends in -e and is invariable for gender
✅ uma mulher inteligente
an intelligent woman
❌ uma camisa azula
Incorrect — adjectives ending in -l like 'azul' don't take a feminine -a
✅ uma camisa azul
a blue shirt
❌ a melhora pizza da cidade
Incorrect — 'melhor' is invariable; 'melhora' is a noun meaning 'improvement'
✅ a melhor pizza da cidade
the best pizza in town
❌ Ela é portuguêsa.
Incorrect — the feminine drops the circumflex because the stress shifts
✅ Ela é portuguesa.
She is Portuguese.
❌ uma menina feliza
Incorrect — 'feliz' ends in -z and is invariable for gender
✅ uma menina feliz
a happy girl
The single most common English-speaker error is the reverse of the real difficulty: rather than forgetting to inflect, beginners over-inflect, inventing feminine forms like "azula" or "feliza" for adjectives that never change. Learn the endings that genuinely take -a (-o, -or, -ês, -ão, -u) and treat everything else as invariable for gender until proven otherwise.
Key Takeaways
- The noun's gender decides the adjective's ending — the adjective has no gender of its own.
- -o → -a is the big regular pattern (bonito/bonita).
- Adjectives in -e and most consonants are invariable for gender (inteligente, feliz, azul, comum).
- -or → -ora, -ês → -esa, -ão → -ã/-ona, -u → -ua are the other changing patterns.
- Comparatives melhor, pior, maior, menor never change for gender.
Now practice Portuguese
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Start learning Portuguese→Related Topics
- Number AgreementA1 — How Portuguese adjectives form their plural to match plural nouns — using the same rules as nouns, plus the masculine-default rule for mixed groups.
- 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.
- Noun Gender BasicsA1 — The core of Brazilian Portuguese gender: the -o (masculine) / -a (feminine) tendency, the article as the real gender marker, and how gender follows biology for people and animals — plus why you must always learn the article with the noun.
- Gender Rules and PatternsA1 — Beyond -o/-a: the noun suffixes that predict gender reliably in Brazilian Portuguese — -ção, -dade, -gem, -tude are feminine; -or, -ês, -ema, and the Greek -ma set are masculine — so 'o problema' and 'a viagem' aren't exceptions at all.
- Adjective Placement (Pre vs Post Noun)A2 — Why most Brazilian adjectives follow the noun, which ones precede it, and the set whose meaning flips depending on whether they come before or after — literal vs. figurative.