One of the best ways to stem this flow of guns is to identify which gun dealers are improperly selling to criminals.
He had always felt himself to be improperly regarded as a penultimate, rather than the ultimate he so clearly was.
Similarly, early progressives feared the power of an improperly informed public.
mid-15c., "not true," from French impropre (14c.), from Latin improprius, from assimilated form of in- "not, opposite of" (see in- (1)) + proprius (see proper). Meaning "not suited, unfit" is from 1560s; that of "not in accordance with good manners, modesty, decency" is from 1739. Related: Improperly (late 14c.).