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