adjective
a word that describes or modifies a noun or pronoun, in this case, 'impeachable' describes something that can be impeached
-
The evidence presented in the trial was deemed impeachable by the jury.
-
I heard that the witness's testimony was impeachable in court.
-
The lawyer totally proved that the defendant's alibi was impeachable.
-
His actions were so egregious that they were impeachable in the eyes of the public.