When we want to say "extremely [adjective/adverb]" in Spanish, we sometimes use the endings -ísimo, -ísima, -ísimos, -ísimas, as an alternative to muy, super, realmente; for example: muy caro, super caro, realmente caro, carísimo.
For superlatives that are regular or semi-regular see Superlatives -ísimo with adjectives ending in -o, -io, -l and -ar.
In this lesson we are going to explain some irregularities to do with consonant changes with some specific adjectives: ending in -co, -go, -ble, -z
Adjectives that end in -co
Aquel hombre posee un patrimonio riquísimo.That man (over there) possesses a very rich heritage.
In the example above, the adjective rico ends in -co, and this ending is replaced by -qu before it takes the ending -ísimo.
Adjectives that end in -go
Mi abuela tenía una melena larguísima cuando era joven.My grandmother had really long hair when she was young.
In the example above, the adjective largo ends in -go, and this ending is replaced by -gu before it takes the ending -ísima.
Adjectives that end in -ble
Tienen que ser amabilísimos con ella si quieren que les perdone.They have to be really kind to her if they want to be forgiven.
In this case, the adjective amable ends in -ble, and this ending is replaced by -bil before it takes the ending -ísimos.
Adjectives that end in -z
Cuando nos casemos, seremos felicísimas las dos.When we get married, we will both be very happy.
In this case, the adjective feliz ends in -z, and this ending is replaced by -c before it takes the ending -ísimas.
The consonant changes apply to all forms of the superlative -ísimo, -ísima, -ísimos, -ísimas
See also Superlativo How to say the most / the least + adjective (superlatives) and Superlatives -ísimo with adjectives ending in -o, -io, -l and -ar
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