Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
emotionless is an adjective meaning "unmoved by feeling". It carries one recorded sense.
unmoved by feeling
“he kept his emotionless objectivity and faith in the cause he served”
“this passionless girl was like an icicle in the sunshine”
Definitions, synonyms and semantic relations for emotionless come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.