"weakening" in the noun sense
1. weakening
becoming weaker
2. weakening
the act of reducing the strength of something
"weakening" in the verb sense
1. weaken
lessen the strength of
"The fever weakened his body"
2. weaken
become weaker
"The prisoner's resistance weakened after seven days"
3. sabotage, undermine, countermine, counteract, subvert, weaken
destroy property or hinder normal operations
"The Resistance sabotaged railroad operations during the war"
4. de-escalate, weaken, step down
reduce the level or intensity or size or scope of
"de-escalate a crisis"
5. dampen, damp, soften, weaken, break
lessen in force or effect
"soften a shock"
"break a fall"
"weakening" in the adjective sense
1. debilitative, enervating, enfeebling, weakening
causing debilitation
2. weakening
moderating by making pain or sorrow weaker
Source: WordNet® (An amazing lexical database of English)
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