UNIMPE'ACHABLE, a. 1. That cannot be impeached; that cannot be accused; free from stain, guilt or fault; as an unimpeachable reputation. 2. That cannot be called in question; as an unimpeachable claim or testimony.
adj 1: beyond doubt or reproach; "an unimpeachable source" 2: free of guilt; not subject to blame; "has lived a blameless life"; "of irreproachable character"; "an unimpeachable reputation" [syn: blameless, inculpable, irreproachable, unimpeachable] 3: completely acceptable; not open to exception or reproach; "two unexceptionable witnesses"; "a judge's ethics should be unexceptionable" [syn: unexceptionable, unimpeachable]
adjectiveDate: 1784 not impeachable: as a. reliable beyond a doubt <unimpeachable evidence> <an unimpeachable source> b. not liable to accusation ;irreproachable<an unimpeachable reputation> • unimpeachablyadverb
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.