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