Using the suffixes -ísimo, -ísima, -ísimos, -ísimas to say to say extremely/very

When we want to say "extremely" [adjective/adverb] in Spanish, we often use the endings -ísimo, -ísima, -ísimos, -ísimas.

Read and listen to these examples:

Mi mejor amigo Adrián es listísimo.
My best friend Adrian is very clever.

La profesora nueva es inteligentísima.
The new teacher is really intelligent.

Los conciertos de la calle son ruidosísimos.
The street concerts are the noisiest.

Las instalaciones del hotel están limpísimas.
The hotel facilities are extremely clean.

If the adjective ends in a single vowel, the vowel is removed and replaced by -ísimo, -ísima, -ísimos or -ísimas.

alegre = alegrísimo
Cheerful = very cheerful

If the adjective ends in -io, then both vowels are removed and replaced by -ísimo, -ísima, -ísimos or -ísimas.

limpio → limp-ísimo/-a/-os/-as

suciosuc-ísimo /-a/-os/-as

See also:

Learn more about these related Spanish grammar topics

Examples and resources

La profesora nueva es inteligentísima.
The new teacher is really intelligent.


Mi mejor amigo Adrián es listísimo.
My best friend Adrian is very clever.


Las instalaciones del hotel están limpísimas.
The hotel facilities are extremely clean.


alegre = alegrísimo
Cheerful = very cheerful


Los conciertos de la calle son ruidosísimos.
The street concerts are the noisiest.


Q&A Forum 1 question, 3 answers

KennethC1Kwiziq community member

No vengas ________, o no iremos al concierto. Don't arrive really late, or we won't get to the concert.

Asked 1 year ago
InmaKwiziq team member

Hi Kenneth 

What is your question exactly?

KennethC1Kwiziq community member

Hi Inma

My question is:  In the question above, why is the answer tardísima verus tardísimo.  I am trying to see what makes the answer femine instead of masculine.

KB1Kwiziq community member
I have this question as well. In the case of tú and usted commands, how do we know whether or not we should use the feminine or masculine form of the adverb? if we don't know the genders of the the subjects of the commands - how do we choose the appropriate ending?  The results seem to vary based on the test questions and the "Kwiz" questions, so I have not been able to find any context clues to answer this question.

No vengas ________, o no iremos al concierto. Don't arrive really late, or we won't get to the concert.

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