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