faultless; flawless; irreproachable: impeccable manners.
not liable to sin; incapable of sin.

Origin of impeccable

First recorded in 1525–35, impeccable is from the Latin word impeccābilis faultless, sinless. See im-2, peccable
Related formsim·pec·ca·bil·i·ty, nounim·pec·ca·bly, adverb

Synonyms for impeccable Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for impeccability

Historical Examples of impeccability

  • I assured him of the impeccability of his attire, and commented on its splendour.

    Simon the Jester

    William J. Locke

  • She thought Miss Rexhill a most imposing young woman and she believed in the impeccability of the well-to-do.

    Hidden Gold

    Wilder Anthony

  • Henry, on his side, was determined to allow nothing to stand in his way, whilst keeping up his appearance of impeccability.

  • Obviously, she had founded her plan of impeccability on the grand phrase—'Could you endure to share me with another?'

    The Child of Pleasure

    Gabriele D'Annunzio

  • His white suits lost their impeccability; often he left the upper button open.


    James Hopper

British Dictionary definitions for impeccability



without flaw or error; faultlessan impeccable record
rare incapable of sinning
Derived Formsimpeccability, nounimpeccably, adverb

Word Origin for impeccable

C16: from Late Latin impeccābilis sinless, from Latin im- (not) + peccāre to sin
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 impeccability



1530s, "not capable of sin," from Middle French impeccable (15c.) or directly from Late Latin impeccabilis "not liable to sin," from assimilated form of in- "not, opposite of" (see in- (1)) + pecare "to sin," of unknown origin. Meaning "faultless" is from 1610s. Related: Impeccably.

Online Etymology Dictionary, © 2010 Douglas Harper