v. t.
Their hands shall be weakened from the work, that it be not done. Neh. vi. 9. [ 1913 Webster ]
v. i. To become weak or weaker; to lose strength, spirit, or determination; to become less positive or resolute;
n. One who, or that which, weakens. “[ Fastings ] weakeners of sin.” South. [ 1913 Webster ]