Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
lifelessly is an adverb meaning "without animation or vitality". It carries 3 recorded senses.
without animation or vitality
“lifelessly he performed the song”
in a lifeless manner
“the girl lay in her arms lifelessly”
as if dead
Definitions, synonyms and semantic relations for lifelessly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.