Regular Adjectives in Portuguese

In Brief

Portuguese adjectives normally agree with the noun they describe in gender and number: um rapaz alto, uma rapariga alta, rapazes altos, raparigas altas. Adjectives ending in -o usually have four forms, while many ending in -e or a consonant use one form for both genders and change only in the plural: uma cidade grande, cidades grandes.

Overview

An adjective is a describing word such as “tall,” “new,” or “interesting.” A noun is the word for the person, place, thing, or idea being described. In Portuguese, an adjective usually shows agreement: its form matches the noun’s grammatical gender (masculine or feminine) and number (singular or plural).

This is different from English. English “new” stays unchanged in “a new book” and “new houses.” Portuguese uses um livro novo, uma casa nova, livros novos, and casas novas. The adjective follows the gender of the Portuguese noun, not any quality of the object itself. A table is not naturally female, but mesa is grammatically feminine, so “a new table” is uma mesa nova.

At A1, concentrate on two dependable patterns: four-form adjectives such as alto/alta/altos/altas, and adjectives with the same masculine and feminine form, such as grande/grandes. Most descriptive adjectives come after the noun. Later sections cover spelling patterns, mixed groups, adjective position, and less regular cases that you can learn gradually.

How It Works

The four-form pattern: -o, -a, -os, -as

For a regular adjective ending in -o, replace -o with -a for the feminine. Add -s to make either form plural.

Gender and number	Ending	alto (“tall”)	Example
Masculine singular	-o	alto	um rapaz alto
Feminine singular	-a	alta	uma rapariga alta
Masculine plural	-os	altos	dois rapazes altos
Feminine plural	-as	altas	duas raparigas altas

The same pattern applies to many everyday adjectives:

Base form	Masculine plural	Feminine singular	Feminine plural	Meaning
bonito	bonitos	bonita	bonitas	beautiful, pretty
novo	novos	nova	novas	new
pequeno	pequenos	pequena	pequenas	small
caro	caros	cara	caras	expensive
cansado	cansados	cansada	cansadas	tired

The masculine singular is the form usually given in dictionaries. It is a useful starting point, but it is not a neutral form that can be used with every noun.

The two-form pattern: one singular form for both genders

Many adjectives do not distinguish masculine from feminine. Adjectives ending in -e commonly belong here. Their singular form stays the same, and the plural normally adds -s.

Gender and number	grande (“big”)	inteligente (“intelligent”)
Masculine singular	um quarto grande	um aluno inteligente
Feminine singular	uma cidade grande	uma aluna inteligente
Masculine plural	quartos grandes	alunos inteligentes
Feminine plural	cidades grandes	alunas inteligentes

Many adjectives ending in -l or -z also have one form for both genders, though their plurals require a spelling change.

Singular, both genders	Plural, both genders	Change	Meaning
fácil	fáceis	final -l changes to -is	easy
difícil	difíceis	final -l changes to -is	difficult
azul	azuis	final -l changes to -is	blue
feliz	felizes	add -es	happy
capaz	capazes	add -es	capable

The written accent can also change when the plural changes the stress pattern: fácil becomes fáceis. Learn the singular and plural together rather than trying to reconstruct every spelling rule while speaking.

Other consonant endings often take -es, as in popular → populares. However, an ending alone does not always predict gender behavior. For example, nationality adjectives in -ês have feminine forms: português, portuguesa, portugueses, portuguesas. Treat such families as their own patterns rather than forcing them into the basic two-form rule.

Agreement is with the noun, not the speaker

Choose the adjective from the noun being described:

• Eu comprei uma mochila nova. — “I bought a new backpack.” The speaker’s gender is irrelevant; nova agrees with mochila.
• O quarto está limpo. — “The room is clean.” Limpo agrees with masculine quarto.
• As janelas estão abertas. — “The windows are open.” Abertas agrees with feminine plural janelas.

Articles and other words can help you identify the noun’s gender and number: o livro novo, a casa nova, os livros novos, as casas novas.

Adjectives also agree after a verb

An adjective need not stand directly beside the noun. A predicate adjective (an adjective linked to the noun by a verb such as “be” or “seem”) still agrees with that noun.

Pattern	Portuguese	English
noun + adjective	uma sopa quente	a hot soup
ser + adjective	A sopa é quente.	The soup is hot.
estar + adjective	A sopa está quente.	The soup is hot.
parecer + adjective	A sopa parece quente.	The soup seems hot.

The choice between ser and estar adds a meaning contrast, but it does not change agreement: O café está frio and A água está fria.

Agreement with more than one noun

With two or more plural referents of the same gender, use that gender in the plural:

• a mãe e a filha cansadas — the tired mother and daughter
• o pai e o filho cansados — the tired father and son

In the standard beginner rule, a mixed group takes the masculine plural: o pai e a filha cansados. This grammatical convention does not tell you that the male member is more important; it is simply the traditional agreement pattern.

Normal position

Most ordinary descriptive adjectives follow the noun:

• um carro novo — a new car
• uma pergunta difícil — a difficult question
• estudantes inteligentes — intelligent students

Some adjectives can come before the noun, sometimes with a change in emphasis or meaning. For now, noun + adjective is the safest default. Position is treated more fully in Adjective Position.

Examples in Context

Portuguese	English	Note
Um rapaz alto trabalha aqui.	A tall boy works here.	Masculine singular -o
Uma rapariga alta trabalha aqui.	A tall girl works here.	Feminine singular -a; rapariga is especially common in Portugal
Os prédios novos ficam perto da estação.	The new buildings are near the station.	Masculine plural -os
Comprei duas camisas brancas.	I bought two white shirts.	Feminine plural -as
Ela é uma médica muito simpática.	She is a very nice doctor.	The adjective agrees with feminine médica
Estudantes inteligentes fazem muitas perguntas.	Intelligent students ask many questions.	inteligente has one gender form
Lisboa é uma cidade grande.	Lisbon is a big city.	Feminine cidade, but grande does not change for gender
Estas malas são grandes e pesadas.	These suitcases are big and heavy.	Both adjectives are feminine plural
O exercício parece fácil.	The exercise seems easy.	Singular fácil after a verb
As primeiras lições são fáceis.	The first lessons are easy.	Plural spelling fáceis
A criança está feliz.	The child is happy.	feliz works with either gender
Todos ficaram felizes com a notícia.	Everyone was happy about the news.	Plural felizes
Tenho uma bicicleta azul e dois capacetes azuis.	I have a blue bicycle and two blue helmets.	azul is the same for gender; plural azuis
O João e a Ana estão cansados.	João and Ana are tired.	A mixed group takes masculine plural in the standard rule

Common Mistakes

Leaving an -o adjective unchanged

• Wrong: uma casa bonito
• Right: uma casa bonita
• Why: Feminine singular casa requires feminine singular bonita. English does not change “beautiful,” but Portuguese does.

Matching the nearest English idea instead of the Portuguese noun

• Wrong: a problema difícil
• Right: o problema difícil
• Why: Problema is masculine despite its -a ending. Agreement depends on the noun’s actual grammatical gender, so learn nouns with their articles.

Adding a feminine ending to a two-form adjective

• Wrong: uma cidade granda or uma aluna inteligenta
• Right: uma cidade grande; uma aluna inteligente
• Why: These adjectives use the same singular form for masculine and feminine. Not every adjective has an -o/-a contrast.

Making the noun plural but not the adjective

• Wrong: dois livros novo
• Right: dois livros novos
• Why: Every adjective describing livros must also be plural.

Forming consonant plurals by adding only -s

• Wrong: exercícios difícils; pessoas felizs
• Right: exercícios difíceis; pessoas felizes
• Why: Final -l and -z follow their own plural spelling patterns: difícil → difíceis and feliz → felizes.

Agreeing with the speaker instead of the described noun

• Wrong: Eu sou uma pessoa cansado.
• Right: Eu sou uma pessoa cansada.
• Why: Here the adjective belongs to feminine noun pessoa. Even a male speaker says uma pessoa cansada in this structure.

Usage Notes

Portuguese is spoken across several continents, and vocabulary varies. Um rapaz alto and uma rapariga alta are natural in European Portuguese; in Brazil, um garoto alto and uma garota alta may be more usual in many contexts. The agreement rule itself is the same.

Adjective position is more flexible than the beginner default suggests. Following the noun is normal for a literal classification or description: um carro velho (“an old car”). Placement before the noun can add evaluation, emphasis, or a conventional meaning. Compare um homem grande (“a big man”) with um grande homem (“a great man”). Do not assume that moving an adjective leaves its meaning unchanged.

When several adjectives describe one noun, each agrees separately: uma casa pequena, branca e confortável. In natural speech and writing, speakers may connect them with e (“and”) or separate them with commas, just as English does.

Beyond the Basics / Advanced Use

You do not need to master these details at A1, but they explain forms you will meet later.

Some endings have additional patterns

The four-form and two-form groups cover a great deal, not every adjective. Common nationality adjectives may have forms such as brasileiro/brasileira and português/portuguesa. Some adjectives ending in -or form a feminine in -ora, as in trabalhador/trabalhadora. Others may be invariant (unchanged), especially certain borrowed words or color expressions. A dictionary is the safest guide when a form does not fit a familiar family.

Compound colors and nouns used as colors

Basic color adjectives normally agree: sapato preto, camisa preta, sapatos pretos, camisas pretas. More complex color expressions are less uniform. Nouns used as color labels, such as laranja (“orange”), are often left unchanged in careful standard usage: camisas laranja. Usage can vary, and everyday speakers may regularize some color words. Learn common color combinations as complete phrases.

One adjective can describe nouns of different genders

The traditional standard rule uses masculine plural when one adjective refers jointly to masculine and feminine nouns: um casaco e uma camisa novos. Word order and meaning can create more advanced agreement choices in some constructions, especially when the adjective follows a list. For clear everyday writing, restructuring is often easiest: um casaco novo e uma camisa nova.

Meaning can affect position

A few frequent adjectives have a conventional contrast depending on placement. Besides grande, compare um amigo velho (“an elderly/old friend”) with um velho amigo (“a long-standing friend”). This is not a new agreement rule: both velho forms still match masculine singular amigo. It is a question of adjective position and interpretation.

Agreement can reveal what an adjective refers to

In longer sentences, the ending helps the reader identify the noun being described. In Encontrei a professora cansada, feminine singular cansada naturally points to a professora. Agreement therefore carries information that English often leaves to context.

Practice Tips

1. Learn nouns with an article and adjectives as a four-cell set. Say o livro novo, a casa nova, os livros novos, as casas novas. This combines noun gender with adjective agreement instead of practising them separately.
2. Sort new adjectives into pattern families. Keep one list for bonito/bonita/bonitos/bonitas, another for grande/grandes, and smaller lists for forms such as fácil/fáceis and feliz/felizes.
3. Describe objects around you aloud. Start with one noun and one adjective, then switch gender and number: um copo limpo → dois copos limpos; uma janela limpa → duas janelas limpas. Check both the noun and adjective endings.

Related Concepts

• Prerequisite: Gender of Nouns — learn how to identify the noun’s gender before choosing an adjective form.
• Next step: Adjective Position — see when adjectives come before or after the noun and how position can affect meaning.
• Next step: Demonstrative Adjectives — apply gender and number agreement to forms such as este, esta, estes, and estas.
• Later topic: Comparisons — use adjectives in structures meaning “bigger,” “less difficult,” and “as interesting as.”