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also tran·quil·lize  (trăng′kwə-līz′, trăn′-)
v. tran·quil·ized, tran·quil·iz·ing, tran·quil·iz·es also tran·quil·lized or tran·quil·liz·ing or tran·quil·liz·es
1. To make tranquil; pacify: "Nothing contributes so much to tranquilize the mind as a steady purpose" (Mary Shelley).
2. To sedate or relieve of anxiety or tension by the administration of a drug.
1. To become tranquil; relax.
2. To have a calming or soothing effect.

tran′quil·i·za′tion (-kwə-lĭ-zā′shən) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.tranquilizing - tending to soothe or tranquilizetranquilizing - tending to soothe or tranquilize; "valium has a tranquilizing effect"; "took a hot drink with sedative properties before going to bed"
depressant - capable of depressing physiological or psychological activity or response by a chemical agent
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
For a while the majestic spectacle before me exercised a tranquilizing influence on the irritable condition of my nerves.
Mark's, one is calm in the cellar; for its details are masterfully ugly, no misplaced and impertinent beauties are intruded anywhere; and the consequent result is a grand harmonious whole, of soothing, entrancing, tranquilizing, soul-satisfying ugliness.
Police arrested 759 persons and recovered a total of 276.858 kilograms hashish, 29.678 kilogram heroin, 6.410 kilogram opium, 4.730 kilogram ice, 11 gram cocaine, ten tranquilizing pills and 9440 wine bottles from them.
Furthermore, Islamabad police have arrested 13 outlaws including six drug-pushers and recovered hashish, heroin, ice, tranquilizing pills, fake currency and weapon from their possession, a police spokesman said.
Moreover, as many as 512 cases were registered against 606 drug pushers after their arrests during the current year, while 160.089 kg hashish, 19.920 kg heroin, 775 ice, 14 tranquilizing pills, 2.5 kilogram opium and 12592 wine bottles were also recovered.
Charles Ziemba and Environmental Police Officer William Woytek shot the bear with a tranquilizing dart as it perched in a tree next to the Athol Daily News parking lot, off Exchange Street.
However, the leopard died due to overdose of medicine used for tranquilizing the animal by a team of experts of Assam Zoo, besides getting injuries after falling from the treetop.