прилагательное безупречный; безукоризненный, совершенный Синоним(ы): blameless, irreproachable
adjective not impeachable: as a. reliable beyond a doubt Example: unimpeachable evidence Example: an unimpeachable source b. not liable to accusation; irreproachable Example: an unimpeachable reputation • unimpeachably adverb