King James Bible

WEAKEN, verb transitive

1. To lessen the strength of, or to deprive of strength; to debilitate; to enfeeble; as, to weaken the body; to weaken the mind; to weaken the hands of the magistrate; to weaken the force of an objection or an argument.

2. To reduce in strength or spirit; as, to weaken tea; to weaken any solution or decoction.