Italian edit

Etymology edit

From efficace +‎ -issimo.

Pronunciation edit

  • IPA(key): /ef.fi.kaˈt͡ʃis.si.mo/
  • Rhymes: -issimo
  • Hyphenation: ef‧fi‧ca‧cìs‧si‧mo

Adjective edit

efficacissimo (feminine efficacissima, masculine plural efficacissimi, feminine plural efficacissime)

  1. superlative degree of efficace (very effective)