Italian edit

Etymology edit

From aperto +‎ -issimo.

Adjective edit

apertissimo (feminine apertissima, masculine plural apertissimi, feminine plural apertissime)

  1. superlative degree of aperto (very open)

Anagrams edit

Latin edit

Adjective edit

apertissimō

  1. dative/ablative masculine/neuter singular of apertissimus