tranquillize
/ˈtræŋkwɪlaɪz/(亦作-ise; <美> tranquilize)
verb
with obj.［usu. as adj. tranquillizing］
1- (of a drug) have a calming or sedative effect on（药）使镇静, 使安静。
1.1
- administer such a drug to (a person or animal)给（人, 动物）服镇静剂。
1.2
- poetic/literary make tranquil〈诗/文〉使安静, 使平静：
joys that tranquillize the mind.
使心绪平静的快乐。