Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
emotionlessly is an adverb meaning "without emotion; devoid of emotion". It carries one recorded sense.
without emotion; devoid of emotion
“the defendant stared unemotionally at the victim's family”
Definitions, synonyms and semantic relations for emotionlessly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.