Attaching “-ísimo” (or sometimes, something slightly different) at the end of an adjective is a way of expressing that adjective at an extreme degree. For example, look at these transformation:
- grande = big
- grandísimo = very very big, extremely big
We will now explain how to form these adjectives.
For most adjectives, you can form their superlative with this system:
- If the Singular Masculine form of the adjective ends in a consonant, just attach “-ísimo” at the end. Pay attention to possible consonant transformations, such as the final “z” becoming “c”.
- If the Singular Masculine form of the adjective ends in a vowel, first eliminate that vowel, and then add “-ísimo”. Again, pay attention to possible consonant transformations.
Adjectives whose Singular Masculine form ends in “-n” or “-or”, will usually add “-císimo” for their superlative form:
Adjectives which add “-bilísimo”
Adjectives ending in “ble” will form their superlative by changing that final “-ble” for “-bilísimo”.
Some adjectives whose Singular Masculine form’s last syllable contains the letter “r”, add the ending “érrimo” in the following manner:
Feminine and plural forms of Superlatives
As you have seen, in forming the Superlative, we have always taken the singular masculine form of the adjective as our starting point.
But of course, once we have formed the superlative, we can now match it to the gender and number of the corresponding noun.
For example, the superlative for “grande” is “grandísimo”. Now we can match its gender and number to a noun, resulting in one of these 4 posibilites:
El coche es carísimo. = The car is extremely expensive. (caro = expensive)
Mi perra es grandísima. = My female dog is extremely big. (grande = big)
Los estudiantes son amabilísimos. = The students are extremely nice. (amable = nice)
Las chicas son listísimas. = The girls are extremely smart (listo = smart)