Italian edit

Etymology edit

From veloce +‎ -issimo.

Adjective edit

velocissimo (feminine velocissima, masculine plural velocissimi, feminine plural velocissime)

  1. superlative degree of veloce (very fast, very quick, very speedy)

Latin edit

Adjective edit

vēlocissimō

  1. dative/ablative masculine/neuter singular of vēlocissimus