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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.
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
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.
ISLAMABAD -- Special Investigation Unit (SIU) of Islamabad Police Tuesday arrested a drug peddler and recovered 1,120 gram hashish and 100 tranquilizing pills, a police spokesman Tuesday said.
Tenders are invited for Supply Of Tranquilizing Gun For The Use Of Capturing/Handling Of Departmental Elephants
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.
Atypical antipsychotic tranquilizing drugs often used to treat agitation in people with severe dementia and other mental disorders may increase the risk for blood clots, according to a report published in the Sept.
Don't pretend to hunt by tranquilizing a deer and then nurse it back to life.