History
History
History
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Meaning:
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(to cause a person, liquid, determination etc) to be or become weak(er)

reduce the strength of

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Cases of word usage

1) to weaken the cottage, confidence, self-discipline etc of (e.g. an army) (demoralize)

2) the deliberate damaging of machinery, material etc to weaken an opponent's activity during an industrial or political dispute (sabotage)

3) to make a hollow or tunnel under (an area of ground); to weaken (health, confidence etc) gradually (undermine)

WEAKEN as in Wiktionary
WEAKEN as in Wikipedia