Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
insufferably is an adverb meaning "to an insufferable degree". It carries 2 recorded senses.
in an extremely arrogant or conceited manner
Definitions, synonyms and semantic relations for insufferably come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.