im·pec·ca·ble

[im-pek-uh-buhl]
adjective
1.
faultless; flawless; irreproachable: impeccable manners.
2.
not liable to sin; incapable of sin.

Origin:
1525–35; < Latin impeccābilis faultless, sinless. See im-2, peccable

im·pec·ca·bil·i·ty, noun
im·pec·ca·bly, adverb


1. unassailable, unexceptionable.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
impeccable (ɪmˈpɛkəbəl) [Click for IPA pronunciation guide]
 
adj
1.  without flaw or error; faultless: an impeccable record
2.  rare incapable of sinning
 
[C16: from Late Latin impeccābilis sinless, from Latin im- (not) + peccāre to sin]
 
impecca'bility
 
n
 
im'peccably
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Impeccable is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
the offspring of a zebra and a donkey.
Etymonline
Word Origin & History

impeccable
1531, "not capable of sin," from M.Fr. impeccable (15c.), from L. impeccabilis "not liable to sin," from in- "not" + pecare "to sin," of unknown origin.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Despite impeccable manners, he kept everyone at a distance.
His integrity and sense of fairness are as impeccable as his timing.
Snowboarders that appreciate an impeccable turn will take satisfaction in this
  snowboard instantly.
Few good proposals are free of risk, and even fewer come with impeccable
  academic credentials.
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