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