Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
vivaciously is an adverb meaning "with vivacity". It carries one recorded sense.
with vivacity
“he describes his adventures vivaciously”
Definitions, synonyms and semantic relations for vivaciously come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.