"somewhat gray," 1590s, from grizzle "gray-colored" + -y (1). Also see grizzled. Grizzly bear (ursus horribilis) for the large ferocious bear of the western U.S., is recorded by 1806; sometimes said to belong rather to grisly (q.v.), but either adjective suits it.[grizzly etymology, grizzly origin, 英语词源]