tranquilizer

n.起镇定作用的人；安定药，镇静剂

trainer, training, training-college, trainman, traipse, trait, traitor, traitorous, trajectory, tram, tramlines, trammel, trammels, tramp, trample, trampoline, trance, tranquil, tranquility, tranquilize, tranquillity, tranquillity (US also tranquility), tranquilly, trans, trans-, transact, transaction, transatlantic, transcend, transcendence, transcendent, transcendental, transcendental meditation, transcendentalism, transcendentalist, transcendentally, transcient, transcontinental, transcribe, transcript,