Note: The spellings 'tranquilize' in American English, and 'tranquillise' in British English, are also used.
To tranquillize a person or an animal means to make them become calm, sleepy, or unconscious by means of a drug.
This powerful drug is used to tranquilize patients undergoing surgery.
= sedate
VERB: Vn
Tranquillize
·vt To render tranquil; to allay when agitated; to Compose; to make calm and peaceful; as, to tranquilize a state disturbed by factions or civil commotions; to tranquilize the mind.