Unimpeachable
Pronunciation : Un`im*peach"a*ble
Part of Speech : a.
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913