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Definition of placidity - 3 dictionary results

plac⋅id

  [plas-id]
Use placidity in a Sentence
–adjective
pleasantly calm or peaceful; unruffled; tranquil; serenely quiet or undisturbed: placid waters.
Origin:
1620–30; < L placidus calm, quiet, akin to placēre to please (orig., to calm); see -id 4

Related forms:
pla⋅cid⋅i⋅ty  [pluh-sid-i-tee] , plac⋅id⋅ness, noun
plac⋅id⋅ly, adverb

Synonyms:
See peaceful.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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plac·id   (plās'ĭd)   
adj.  

  1. Undisturbed by tumult or disorder; calm or quiet. See Synonyms at calm.

  2. Satisfied; complacent.


[Latin placidus, from placēre, to please; see plāk-1 in Indo-European roots.]
pla·cid'i·ty (plə-sĭd'ĭ-tē), plac'id·ness (plās'ĭd-nĭs) n., plac'id·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

placid 
1626, from Fr. placide, from L. placidus "pleasing, gentle," from placere "to please" (see please).
Online Etymology Dictionary, © 2001 Douglas Harper
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