Opiate

Part of speech: noun (n.)

1. Originally, a medicine of a thicker consistence than sirup, prepared with opium. Parr.

2. Any medicine that contains opium, and has the quality of inducing sleep or repose; a narcotic.

3. Anything which induces rest or inaction; that which quiets uneasiness. They chose atheism as an opiate. Bentley.

Part of speech: verb (v.)

To subject to the influence of an opiate; to put to sleep. [R.] Fenton.

Part of speech: adjective (a.)

Inducing sleep; somniferous; narcotic; hence, anodyne; causing rest, dullness, or inaction; as, the opiate rod of Hermes. Milton.