- (of a disease or tumor) spreading rapidly or highly invasive; difficult or impossible to treat successfully.
- pertaining to a risky surgery or treatment, or to a medication that has grave side effects: aggressive chemotherapy.
Examples from the Web for unaggressive
They all wondered what made Aunt Priscilla so unaggressive at supper time.A Little Girl in Old Boston|Amanda Millie Douglas
They had established contact with the natives who were grotesquely huge, but mild and unaggressive.Youth|Isaac Asimov
Moderate in his views, unaggressive in his plans, and absolutely without display, he provoked no antagonisms.Fifty years with the Revere Copper Co.|S. T. Snow
By this, one perceives that the beginning was sufficiently quiet and unaggressive.Chapters from My Autobiography|Mark Twain
Possibly a too complaisant and unaggressive Nature had spoiled them.Openings in the Old Trail|Bret Harte