Tranquilize \Tran"quil*ize\, Tranquillize \Tran"quil*lize\, v.
t. [imp. & p. p. {Tranquilized}or {Tranquilliized}; p. pr. &
vb. n. {Tranquilizing}or {Tranquillizing}.] [Cf. F.
tranquilliser.]
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.
[1913 Webster]
Syn: To quiet; compose; still; soothe; appease; calm; pacify.
[1913 Webster] Tranquilizer