Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
god-awful is an adjective meaning "(informal) very unpleasant". It carries one recorded sense.
(informal) very unpleasant
“hellish weather”
“stop that god-awful racket”
colloquialism
Definitions, synonyms and semantic relations for god-awful come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.