tranquilize

tran·quil·ize
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/ˈtɹæŋkwɪlaɪ̯z/[ˈtɹ̝̊ʷæŋkwɪlaɪ̯z][ˈt̠ɹ̠̊˔ʷæŋkwɪlaɪ̯z]Canada, US/ˈtɹeɪ̯ŋkwɪlaɪ̯z/

verb

To calm (a person or animal) or put them to sleep using a tranquilizer dart.

“The bear should go down several minutes after being tranquilized.”

Opposite
Scrabble 29

Meanings

verbtranquilize (third-person singular simple present tranquilizes, present participle tranquilizing, simple past and past participle tranquilized)

present singular third person tranquilizes · participle present tranquilizing · participle past tranquilized · past tranquilized · alternative tranquillize · alternative tranquilise · alternative tranquillise

  1. transitiveTo calm (a person or animal) or put them to sleep using a tranquilizer dart.

    The escaped lion was finally tracked down, tranquilized, and safely returned to the zoo.

    2 more examples

    Miss Ratched shall line us all against the wall, where we’ll face the terrible maw of a muzzle-loading shotgun which she has loaded with Miltowns! Thorazines! Libriums! Stelazines! And with a wave of her sword, blooie! Tranquilize all of us completely out of existence.

    1962, Ken Kesey, One Flew Over the Cuckoo’s Nest, New York: Dial, page 255

    When the public protests, confronted with some obvious evidence of damaging results of pesticide applications, it is fed little tranquilizing pills of half truth.

    1962, Rachel Carson, chapter 2, in Silent Spring, Boston: Houghton Mifflin, page 13

    Synonyms: dart, sedate

  2. literarytransitiveTo make (something or someone) tranquil.

    1779, Frances Burney, Evelina, Dublin: Price, Corcoran et al., Volume 2, Letter 14, p. 87, […] with words of sweetest kindness and consolation, he soothed and tranquilised me.

    5 more examples

    […] I feel my heart glow with an enthusiasm which elevates me to heaven, for nothing contributes so much to tranquillize the mind as a steady purpose,—a point on which the soul may fix its intellectual eye.

    1816 June – 1817 April/May (date written), [Mary Shelley], Frankenstein; or, The Modern Prometheus. […], volume (please specify |volume=I to III), London: […] [Macdonald and Son] for Lackington, Hughes, Harding, Mavor, & Jones, published 1 January 1818, →OCLC

    This threat, the reader may well suppose, was not very tranquilizing to my feelings.

    1855, Frederick Douglass, chapter 13, in My Bondage and My Freedom. […], New York; Auburn, N.Y.: Miller, Orton & Mulligan […], →OCLC

    The column was placed under the orders of Major Renaud, who pushed up the road; fighting as occasion offered; tranquillizing the country by the very simple expedient of hanging everybody who showed signs of insubordination […]

    1865, G. O. Trevelyan, chapter 5, in Cawnpore, London: Macmillan, page 322

    Supported by an impregnable sense of justice but still dangerously fuming, Lucia went back to her garden-room, to tranquillize herself with an hour’s practice on the new piano.

    1931, E. F. Benson, chapter 4, in Mapp and Lucia

    But time had tranquillized Dina’s worries about the landlord.

    1995, Rohinton Mistry, chapter 11, in A Fine Balance, Toronto: McClelland and Stewart, page 497

    Synonyms: appease, calm, pacify

  3. intransitiveobsoleterareTo become tranquil.

    Seest thou not, that this unseasonable gravity is admitted to quell the palpitations of this unmanageable heart? But still it will go on with its boundings. I’ll try, as I ride in my chariot, to tranquillize.

    1748, [Samuel Richardson], “Letter I”, in Clarissa. Or, The History of a Young Lady: […], volume V, London: […] S[amuel] Richardson; [a]nd sold by John Osborn, […], →OCLC, page 11

    Synonyms: calm down, relax

  4. transitiveTo dart (a person or animal) with a sedative

    The bear should go down several minutes after being tranquilized.

    1 more example

    Moose should only be down about 15 to 20 minutes after being tranquilized.

    2004 March 15, Laura Hancock, Deseret News

Synonyms & antonyms

verbTo calm (a person or animal) or put them to sleep using a tranquilizer dart.

Similar

verbTo make (something or someone) tranquil.

verbTo become tranquil.

Similar
Opposite

More synonyms by meaning

verbcause to be calm or quiet as by administering a sedative to

Broader

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Middle Frenchtranquiliser
  2. Englishtranquilize

From Middle French tranquiliser. Analyzable as tranquil + -ize.

Full word history & related roots →

Translations

Bulgarian упоявам, успокоявам
  • упоявам (upojavam)to use a drug to sedate a person or animal
  • успокоявам (uspokojavam)to make something or someone tranquil
  • успокоявам се (uspokojavam se)to become tranquil
  • успокоявам се (uspokojavam se)to calm down
Catalan tranquil·litzar
  • tranquil·litzarto make something or someone tranquil
Dutch verdoven
  • verdovento use a drug to sedate a person or animal
Esperanto trankviligi
  • trankviligito make something or someone tranquil
Finnish rauhoittaa, antaa rauhoittavia lääkkeitä
  • rauhoittaato use a drug to sedate a person or animal
  • antaa rauhoittavia lääkkeitäto use a drug to sedate a person or animal
  • antaa rauhoittavaato use a drug to sedate a person or animal
  • rauhoittaato make something or someone tranquil
  • asettuato become tranquil
  • laantuato become tranquil
  • rauhoittuato become tranquil
  • rauhoittuato calm down
French tranquilliser, tranquilliser
  • tranquilliserto use a drug to sedate a person or animal
  • tranquilliserto make something or someone tranquil
  • tranquilliserto become tranquil
  • tranquilliserto calm down
German ruhig stellen
  • ruhig stellento make something or someone tranquil
Italian tranquillizzare, sedare
  • tranquillizzareto use a drug to sedate a person or animal
  • sedareto make something or someone tranquil
Japanese 鎮める
  • 鎮める (shizumeru)to make something or someone tranquil
Latin sēdō
  • sēdōto make something or someone tranquil
Portuguese tranquilizar, tranquilizar
  • tranquilizarto use a drug to sedate a person or animal
  • tranquilizarto make something or someone tranquil
Spanish dormir, tranquilizar
  • dormirto use a drug to sedate a person or animal
  • tranquilizarto make something or someone tranquil
  • tranquilizarseto become tranquil
Turkish sakinleştirmek
  • sakinleştirmekto use a drug to sedate a person or animal
Cite this entry
APA

tranquilize. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/tranquilize

MLA

“tranquilize.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/tranquilize. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “tranquilize,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/tranquilize.

Source: tranquilize on Wiktionary, CC BY-SA 4.0.