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