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insouciant

[in-soo-see-uh nt; French an-soo-syahn]
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adjective
  1. free from concern, worry, or anxiety; carefree; nonchalant.
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Origin of insouciant

1820–30; < French, equivalent to in- in-3 + souciant present participle of soucier to worry < Vulgar Latin *sollicītāre, for Latin sollicitāre to disturb; see solicitous
Related formsin·sou·ci·ant·ly, adverb

Synonyms

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lighthearted, debonair, jaunty, breezy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for insouciant

insouciant

adjective
  1. carefree or unconcerned; light-hearted
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Derived Formsinsouciance, nouninsouciantly, adverb

Word Origin

C19: from French, from in- 1 + souciant worrying, from soucier to trouble, from Latin sollicitāre; compare solicitous
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for insouciant

adj.

1829, from French insouciant "careless, thoughtless, heedless," from in- "not" (see in- (1)) + souciant "caring," present participle of soucier "to care," from Latin sollicitare "to agitate" (see solicit). Related: Insouciantly.

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Online Etymology Dictionary, © 2010 Douglas Harper