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