reproach

Definition:

To reproach someone means to criticize or disapprove of that person's character or behavior. A reproach is the negative comment about the person.

Saying that a person is "above reproach" or "beyond reproach" or "without reproach" means that this person behaves in a God-honoring way and there is little or nothing that could be said in criticism of him.
The word "reproach" could also be translated as "accusation" or "shame" or "disgrace."
"To reproach" could also be translated as "to rebuke" or "to accuse" or "to criticize," depending on the context.