Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
half-heartedly is an adverb meaning "without enthusiasm; in a half-hearted manner". It carries one recorded sense.
without enthusiasm; in a half-hearted manner
“she tried half-heartedly”
Definitions, synonyms and semantic relations for half-heartedly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.