OPIATE

I. noun Date: 15th century 1. a drug (as morphine or codeine) containing or derived from opium and tending to induce sleep and alleviate pain, opioid 1, something that induces rest or inaction or quiets uneasiness, II. adjective Date: 1543 1. containing or mixed with opium, of, relating to, binding, or being an ~ , 2. inducing sleep ; narcotic , causing dullness or inaction