• synonyms


or tran·quil·lize

See more synonyms for tranquilize on Thesaurus.com
verb (used with or without object), tran·quil·ized, tran·quil·iz·ing.
  1. to make or become tranquil.
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Also especially British, tran·quil·lise.

Origin of tranquilize

First recorded in 1615–25; tranquil + -ize
Related formstran·quil·i·za·tion, nounun·tran·quil·ize, verb (used with object), un·tran·quil·ized, un·tran·quil·iz·ing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for tranquilize

sedate, hush, compose, subdue, relax, quiet, soothe, quell, lull, pacify, still, quieten, calm, balm, unruffle

Examples from the Web for tranquilize

Historical Examples of tranquilize

  • This tranquilized his spirit, and with this he sought to tranquilize the widow too.

    Life and Times of David

    Charles Henry Mackintosh

  • Tranquilize yourself: at the proper time you will see him again.


    Gustave Aimard

  • It cannot fail to emancipate the heart and tranquilize the conscience.

    The All-Sufficiency of Christ

    Charles Henry Mackintosh

  • Surely these ought to satisfy your heart and tranquilize your mind.

    The All-Sufficiency of Christ

    Charles Henry Mackintosh

  • It is eminently calculated to tranquilize the heart, come what may.

Word Origin and History for tranquilize


1620s, from tranquil + -ize. Related: Tranquilized; tranquilizing.

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Online Etymology Dictionary, © 2010 Douglas Harper

tranquilize in Medicine


  1. To make tranquil; pacify.
  2. To sedate or relieve of anxiety or tension by the administration of a drug.
  3. To become tranquil; relax.
  4. To have a calming or soothing effect.
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Related formstran′quil•i•zation (-kwə-lĭ-zāshən) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.