-
lessen the strength of;
"The fever weakened his body"
-
become weaker;
"The prisoner's resistance weakened after seven days"
-
destroy property or hinder normal operations;
"The Resistance sabotaged railroad operations during the war"
-
reduce the level or intensity or size or scope of;
"de-escalate a crisis"
-
lessen in force or effect;
"soften a shock"
"break a fall"