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