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See more synonyms for fierce on Thesaurus.com
adjective, fierc·er, fierc·est.
  1. menacingly wild, savage, or hostile: fierce animals; a fierce look.
  2. violent in force, intensity, etc.: fierce winds.
  3. furiously eager or intense: fierce competition.
  4. Informal. extremely bad or severe: a fierce cold.
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Origin of fierce

1250–1300; Middle English fiers < Anglo-French fers, Old French fiers (nominative) < Latin ferus wild, fierce; cf. feral1, ferocious
Related formsfierce·ly, adverbfierce·ness, nouno·ver·fierce, adjectiveo·ver·fierce·ly, adverbo·ver·fierce·ness, nounun·fierce, adjectiveun·fierce·ly, adjective


See more synonyms for on Thesaurus.com
1. untamed; cruel, fell, brutal; barbarous, bloodthirsty, murderous. Fierce, ferocious, truculent suggest vehemence and violence of temper, manner, or action: fierce in repelling a foe. Ferocious implies fierceness or cruelty, especially of a bloodthirsty kind, in disposition or action: a ferocious glare; ferocious brutality toward helpless refugees. Truculent suggests an intimidating or bullying fierceness of manner or conduct: His truculent attitude kept them terrified and submissive. 2, 3. furious, passionate, turbulent.


1. tame, mild.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for fierceness

Contemporary Examples

Historical Examples

  • When a woman loves a fierce man she takes the risk of his fierceness.


    William J. Locke

  • Then, the bitterness of Garson's soul was revealed by the fierceness in his voice as he replied.

    Within the Law

    Marvin Dana

  • It was the new Gospel against the old Law, and the fierceness of the struggle rent her.

    Within the Law

    Marvin Dana

  • She stared at him, struck dumb for the moment by the fierceness of his voice and expression.

    The Coryston Family

    Mrs. Humphry Ward

  • But if they were all mildness toward her, they were all fierceness toward one another.

    White Fang

    Jack London

British Dictionary definitions for fierceness


  1. having a violent and unrestrained nature; savagea fierce dog
  2. wild or turbulent in force, action, or intensitya fierce storm
  3. vehement, intense, or strongfierce competition
  4. informal very disagreeable or unpleasant
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Derived Formsfiercely, adverbfierceness, noun

Word Origin

C13: from Old French fiers, from Latin ferus
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 fierceness



mid-13c., "proud, noble, bold," from Old French fers, nominative form of fer, fier "strong, overwhelming, violent, fierce, wild; proud, mighty, great, impressive" (Modern French fier "proud, haughty"), from Latin ferus "wild, untamed," from PIE root *ghwer- "wild, wild animal" (cf. Greek ther, Old Church Slavonic zveri, Lithuanian zveris "wild beast").

Original English sense of "brave, proud" died out 16c., but caused the word at first to be commonly used as an epithet, which accounts for the rare instance of a French word entering English in the nominative case. Meaning "ferocious, wild, savage" is from c.1300. Related: Fiercely; fierceness.

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Online Etymology Dictionary, © 2010 Douglas Harper