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