If you are uncertain about the plural form of adjectives, go back to exercise 6.4

In this exercise, you have to complete the following sentences by entering the correct version of the adjective in brackets. But these adjectives lose a syllable before you add the plural ending (so they are called syncopated adjectives). To form the plural, reduce the number of syllables, then add a or e depending on whether the resulting ending is broad or slender. For example:

íseal -> ís*l -> ísle
deacair -> deac*r -> deacra

(The asterisk indicates the lost syllable.)