To make weak; to lessen the strength of; to deprive of strength; to debilitate; to enfeeble; to enervate; as, to weaken the body or the mind; to weaken the hands of a magistrate; to weaken the force of an objection or an argument
If your resolve weakens or if something weakens it, you become less determined or less certain about taking a particular course of action that you had previously decided to take. Jennie weakened, and finally relented The verdict hasn't weakened his resolve to fight the charges against him
If something weakens you, it causes you to lose some of your physical strength. Malnutrition obviously weakens the patient
To become weak or weaker; to lose strength, spirit, or determination; to become less positive or resolute; as, the patient weakened; the witness weakened on cross-examination
If something weakens an object, it does something to it which causes it to become less firm and more likely to break. A bomb blast had weakened an area of brick on the back wall
If you weaken something or if it weakens, it becomes less strong or less powerful. The recession has weakened so many firms that many can no longer survive Family structures are weakening and breaking up. strengthen