1800, "that which tranquilizes;" from 1824 as "a sedative" (first reference is to ground ivy), agent noun from tranquilize; in reference to one of a large group of anti-anxiety drugs, it is recorded by 1956.
雙語(yǔ)例句
1. If a tranquilizer is prescribed, be sure your physician informs you of its possible side effects, such as addiction.