: not impeachable: as
a : reliable beyond a doubt <unimpeachable evidence> <an unimpeachable source>
b : not liable to accusation : irreproachable <an unimpeachable reputation>
— un·im·peach·ably \-blē\ adverb
Examples of UNIMPEACHABLE
- a person of unimpeachable integrity
- The information is from an unimpeachable source.
First Known Use of UNIMPEACHABLE
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