In Italian some adjectives preserve in the superlative absolute form the Latin ending -errimo.

 

Let’s have a look at them:

 

- acre / acrid —> absolute superlative acerrimo

- celebre / renowned —> absolute superlative celeberrimo

- integro / intact —> absolute superlative integerrimo

- misero / miserable —> absolute superlative miserrimo

- salubre / salubrious —> absolute superlative saluberrimo

- aspro / sour —> absolute superlative asperrimo

- tetro / sullen —> absolute superlative teterrimo

 

Note that it is common nowadays to find acerrimo improperly used as an adjective in its positive degree, synonymous of feroce / fierce. This means that it often recurs in the comparative degree or in the relative superlative form (preceded by the adverb più).

 

For example:

 

Fu il suo più acerrimo nemico. (He was his most fierce enemy.)