Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
assumptive is an adjective meaning "excessively forward". It carries 2 recorded senses.
excessively forward
“an assumptive person”
“on a subject like this it would be too assuming for me to decide”
“the duchess would not put up with presumptuous servants”
accepted as real or true without proof
“the assumed reason for his absence”
“assumptive beliefs”
Definitions, synonyms and semantic relations for assumptive come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.