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