Adjectives: Agreement and Position

An adjective describes a noun. In Spanish it cannot stay fixed like an English adjective: it must agree with the noun it describes in both gender (masculine or feminine) and number (singular or plural).

Look at how rojo (red) changes to match four different nouns:

	Masculine	Feminine
Singular	el coche rojo	la casa roja
Plural	los coches rojos	las casas rojas

This is why the tall boy is el chico alto but the tall girl is la chica alta. The adjective takes its ending from the noun, so getting the noun's gender right (see the nouns lesson) comes first.

Agreement applies wherever the adjective sits, including after the verb ser: Las casas son blancas (The houses are white).

How many forms an adjective has depends on its ending. There are four patterns to know.

Adjective type	Masc. sing.	Fem. sing.	Masc. pl.	Fem. pl.
ends in -o (4 forms)	alto	alta	altos	altas
ends in -e (2 forms)	inteligente	inteligente	inteligentes	inteligentes
ends in consonant (2 forms)	azul	azul	azules	azules
nationality on consonant	español	española	españoles	españolas

The key points:

• -o adjectives change for both gender and number — four distinct forms.
• -e adjectives and most consonant adjectives change only for number: un problema difícil → unos problemas difíciles.
• Nationalities ending in a consonant are the exception: they add -a for the feminine (un chico francés → una chica francesa, dropping the accent).

Unlike English, Spanish normally places the descriptive adjective after the noun.

Spanish	English
un coche rojo	a red car
una idea interesante	an interesting idea
unos zapatos negros	some black shoes
la comida española	the Spanish food

Adjectives of colour, shape, nationality and physical description reliably follow the noun. So while English builds "a red car", Spanish builds "a car red".

When two adjectives describe one noun, join them with y (and) after the noun: una casa grande y bonita (a big and pretty house). Both still agree with casa.

A small, high-frequency group of adjectives loses its final -o when it comes directly before a masculine singular noun. This shortening is called apócope.

Full form	Shortened	Example
bueno	buen	un buen amigo (a good friend)
malo	mal	un mal día (a bad day)
primero	primer	el primer piso (the first floor)
tercero	tercer	el tercer día (the third day)
alguno	algún	algún libro (some book)
ninguno	ningún	ningún problema (no problem)

The shortening only happens before a masculine singular noun. With feminine or plural nouns the full form returns: una buena amiga, unos buenos amigos.

Feminine forms do not shorten: it is una buena idea, never un buen idea.

Grande (big/great) is special. Before any singular noun — masculine or feminine — it shortens to gran, and its meaning shifts.

Position	Form	Meaning
before the noun	un gran hombre	a great man
after the noun	un hombre grande	a big man
before (feminine)	una gran ciudad	a great city
after (feminine)	una ciudad grande	a big city

So position is not always neutral: with grande, moving the adjective changes the meaning from physical size (after) to importance or quality (before).

Before the noun, gran praises; after the noun, grande measures. Un gran libro is a great book; un libro grande is a physically large book.

In the plural, grandes keeps its full form in both positions: grandes ciudades (great cities).

Which verb you pick to link an adjective to a subject changes the meaning. This is a cornerstone of Spanish (covered in full in the Ser vs Estar lesson).

• ser + adjective → an inherent, defining or long-term quality
• estar + adjective → a temporary state, condition or how something feels right now

ser (quality)	estar (state)
Es alto. (He is tall.)	Está cansado. (He is tired.)
Es simpática. (She is nice.)	Está enferma. (She is ill.)
La nieve es blanca. (Snow is white.)	La sopa está fría. (The soup is cold.)

Some adjectives flip meaning depending on the verb:

Adjective	With ser	With estar
aburrido	boring (Es aburrido)	bored (Está aburrido)
listo	clever (Es listo)	ready (Está listo)

The adjective still agrees with the subject in both cases: Las chicas están cansadas.

1. Leaving the adjective unchanged

Every adjective must match its noun. Las casas blanco is wrong; it must be las casas blancas. Check gender and number every time.

2. Putting descriptive adjectives before the noun

Colours, shapes and nationalities go after the noun: un coche rojo, not un rojo coche. Only the small shortening set (buen, mal, gran, primer…) leads.

3. Using the full form where it should shorten

Before a masculine singular noun, use buen, mal, primer and gran: un buen día, not un bueno día.

4. Mixing up gran and grande

Un gran hombre is a great man; un hombre grande is a big man. The position carries the meaning, so place it deliberately.

5. Choosing the wrong verb: ser or estar

Es aburrido means he is boring; está aburrido means he is bored. Match the verb to whether you mean a defining quality (ser) or a current state (estar).