Tran"quil*ize, 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.
Syn. -- To quiet; compose; still; soothe; appease; calm; pacify.
© Webster 1913.