Why was clemency trending last week?
c.1600, from French compulsif, from Latin compulsus, past participle of compellere (see compel). Psychological sense is from 1902. As a noun, attested from 1630s; psychological sense from 1957. Related: Compulsively; compulsiveness.
compulsive com·pul·sive (kəm-pŭl'sĭv)
Caused or conditioned by compulsion or obsession. n.
A person with behavior patterns governed by a compulsion.