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[plas-id] /ˈplæs ɪd/
pleasantly calm or peaceful; unruffled; tranquil; serenely quiet or undisturbed:
placid waters.
Origin of placid
1620-30; < Latin placidus calm, quiet, akin to placēre to please (orig., to calm); see -id4
Related forms
[pluh-sid-i-tee] /pləˈsɪd ɪ ti/ (Show IPA),
placidness, noun
placidly, adverb
unplacid, adjective
unplacidly, adverb
unplacidness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for placidity
Historical Examples
  • His usually placid, gentle face had lost some of its placidity.

    Mary-'Gusta Joseph C. Lincoln
  • It's difficult to give you an adequate idea of Davidson's placidity.

    Victory Joseph Conrad
  • That placidity of hers gave her the air of being as relentless as a Fate.

    Mary Gray Katharine Tynan
  • "In a position which I no longer occupy," he amended, recovering his placidity.

    Tristram of Blent Anthony Hope
  • Her face was flushed; indignation disturbed the placidity of her eyes.

    Trail's End

    George W. Ogden
  • The stranger's excitement was a strong contrast to the Major's placidity.

  • Any reference to the "right one" always disturbed her placidity.

  • In repose the face wore a placidity which was almost that of melancholy.

    The Sign of the Spider Bertram Mitford
  • Her placidity was exceedingly annoying to this set of girls.

    Hester's Counterpart Jean K. Baird
  • I asked, remaining stubbornly and persistently ox-like in my placidity.

    The Prairie Mother Arthur Stringer
British Dictionary definitions for placidity


having a calm appearance or nature
Derived Forms
placidity (pləˈsɪdɪtɪ), placidness, noun
placidly, adverb
Word Origin
C17: from Latin placidus peaceful; related to placēre to please
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
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Word Origin and History for placidity

1610s, from Latin placiditatem (nominative placiditas), from placidus (see placid).



1620s, from French placide (15c.) and directly from Latin placidus "pleasing, peaceful, quiet, gentle, still, calm," from placere "to please" (see please). Related: Placidly; placidness.

Online Etymology Dictionary, © 2010 Douglas Harper
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