-(p)tiv adjective
Etymology: probably from (assumed) New Latin assumptivus, from Latin assumptus, past participle of assumere + -ivus -ive
: assumed , assuming : as
a. : taken as one's own
upstarts with their assumptive arms
b. : taken for granted or inclined to take for granted
assumptive beliefs
the assumptive habits of her mind
c. : making undue claims
an assumptive person