'Counselor' in the Bible

And Absalom sent for Ahithophel the Gilonite, David’s counselor, from his city Giloh, while he was offering sacrifices. And the conspiracy grew strong, for the people with Absalom increased continually.

David was told, “Ahithophel [your counselor] is among the conspirators with Absalom.” David said, “O Lord, I pray You, turn Ahithophel’s counsel into foolishness.”

I am this day eighty years old. Can I [be useful to advise you to] discern between good and bad? Can your servant taste what I eat or drink? Can I still hear the voices of singing men and women? Why then should your servant be an added burden to my lord the king?