• synonyms


[uhn-im-pee-chuh-buh l]
See more synonyms for unimpeachable on Thesaurus.com
  1. above suspicion; impossible to discredit; impeccable: unimpeachable motives.
Show More

Origin of unimpeachable

First recorded in 1775–85; un-1 + impeachable
Related formsun·im·peach·a·bil·i·ty, un·im·peach·a·ble·ness, nounun·im·peach·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unimpeachably

Contemporary Examples

Historical Examples

  • Not folly in believing in him and his authority—on that he was unimpeachably sincere.

  • It is her ambition to lead, but to lead nobly and unimpeachably.

  • We strive to hope that, though almost as curious, it is not so unimpeachably appropriate as the one quoted above.

  • Yet Miss Quisanté laughed, as a man's relatives often will although the rest of the world is unimpeachably grave.


    Anthony Hope

  • The authorities on which Mrs. Oliphant relies for her facts are unimpeachably good.

British Dictionary definitions for unimpeachably


  1. unquestionable as to honesty, truth, etc
Show More
Derived Formsunimpeachability or unimpeachableness, noununimpeachably, adverb
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 unimpeachably



1784, from un- (1) "not" + impeachable. Related: Unimpeachably.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper