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