Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unperceptive is an adjective meaning "lacking perception". It carries 2 recorded senses.
lacking perception
“as unperceptive as a boulder”
lacking sensitivity, taste, or judgment
Definitions, synonyms and semantic relations for unperceptive come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.