Adjective Agreement in Irish

In this article, we will look at the basic rules for how to make an adjective agree with the gender and number of a noun!

Irish adjectives, like many European languages, like to make their adjectives agree in number (singular/plural), gender (masculine/feminine) and case (nominative/genitive/vocative) with the noun they are being used to describe.

This article will look at the most basic rules for the nominative case, which all beginners should know!

About adjectives in Irish

fear deas

bean dheas

fir dheasa

mná deasa

How adjectives work in Irish

Adjectives are words used to describe nouns and in Irish, they must agree with the gender, number and case of the noun which they are describing. Two terms often used by grammar books when speaking about adjectives are predicative and attributive.

A predicative adjective just means an adjective which is not directly attached to the noun. For example:

  • The glass is red.

An attributive adjective just means an adjective which is directly attached to the noun. For example:

  • the red glass

In Irish, agreement will only occur if the adjective is directly attached to the noun (i.e. it is attributive.)

  • The glass is red. => Tá an ghloine dearg

  • the red glass => an ghloine dhearg

If an adjective is attached to a masculine noun, there will be no change to the adjective (i.e. it will be the same form you’ll find in the dictionary).

Here are some examples:

fear deas

bosca mór

siúcra mín

doras buí

If an adjective is attached to a feminine noun, the adjective will get a séimhiú (lenition).

Here are some examples:

bean dheas

cistin mhór

seacláid mhín

cathaoir bh

If an adjective is attached to a plural noun, the adjective will have an -a or -e added to it (depending on whether it’s broad or slender).

Note that adjectives already ending in a vowel will not get an extra vowel (e.g. buí, oráiste, fada).

Here are some examples:

mná deasa

boscaí móra

cíora míne

doirse buí_

Note that the only time that you will ever see a plural adjective with lenition is if the plural noun itself ends in a slender consonant.

Here are some examples:

fir dheasa

buidéil mhóra

boird ghorma

leabhair bh