Read the dictionary definition of weaken. All definitions for this word.
1. become weaker
1. The prisoner's resistance weakened after seven days
2. lessen the strength of
1. The fever weakened his body
3. reduce the level or intensity or size or scope of
1. de-escalate a crisis
4. lessen in force or effect
1. soften a shock
2. break a fall
5. destroy property or hinder normal operations
1. The Resistance sabotaged railroad operations during the war