Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
prestissimo is an adjective and adverb meaning "(of tempo) as fast as possible". It carries 2 recorded senses.
(of tempo) as fast as possible
extremely fast; as fast as possible
“this passage should be played prestissimo”
music
Definitions, synonyms and semantic relations for prestissimo come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.