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[im-pek-uh-buh l] /ɪmˈpɛk ə bəl/
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 forms
impeccability, noun
impeccably, adverb
1. unassailable, unexceptionable. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for impeccably
Contemporary Examples
Historical Examples
  • Towards the girl and her father he was impeccably respectful.

    Out of the Depths

    Robert Ames Bennet
  • To be impeccably correct, initials should not be engraved on a visiting card.

    Etiquette Emily Post
  • He selected a peak some ten miles away, and shot to it in a line which was impeccably straight.

    The Trimming of Goosie James Hopper
  • The victims of the "accident," if there had really been any such, made no boast of it, and the dumb boy was impeccably discreet.

    The Surprises of Life Georges Clemenceau
  • But the Act as it stood, ignoring this vital change, was impeccably Conservative, and on that account went through.

    The Framework of Home Rule Erskine Childers
British Dictionary definitions for impeccably


without flaw or error; faultless: an impeccable record
(rare) incapable of sinning
Derived Forms
impeccability, noun
impeccably, adverb
Word Origin
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
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Word Origin and History for impeccably



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
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