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unimpeachable - 4 dictionary results

un⋅im⋅peach⋅a⋅ble

[uhn-im-pee-chuh-buhl]
–adjective
above suspicion; impossible to discredit; impeccable: unimpeachable motives.

Origin:
1775–85; un- 1 + impeachable


un⋅im⋅peach⋅a⋅bil⋅i⋅ty, un⋅im⋅peach⋅a⋅ble⋅ness, noun
un⋅im⋅peach⋅a⋅bly, adverb
un·im·peach·a·ble   (ŭn'ĭm-pē'chə-bəl)   
adj.  
  1. Difficult or impossible to impeach: an unimpeachable witness.
  2. Beyond reproach; blameless: unimpeachable behavior.
  3. Beyond doubt; unquestionable: "works of such unimpeachable greatness" (Musical Heritage Review).
un'im·peach'a·bly adv.

Unimpeachable

Un`im*peach"a*ble\, a. Not impeachable; not to be called in question; exempt from liability to accusation; free from stain, guilt, or fault; irreproachable; blameless; as, an unimpeachable reputation; unimpeachable testimony. --Burke. -- Un`im*peach"a*ble*ness, n. -- Un`im*peach"a*bly, adv.

unimpeachable 
1784, from un- (1) "not" + impeach (v.) + -able.
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