Synonyms of weaken in English:

weaken


See definition of weaken

verb

1‘the virus has weakened him terribly’

SYNONYMS
enfeeble, debilitate, incapacitate, sap one's strength, enervate, tire, exhaust, wear out
wither, erode, diminish, destroy
ANTONYMS

strengthen

2‘she tried to weaken the impact of what she'd just said’

SYNONYMS
reduce, decrease, diminish, lessen, moderate, temper, sap, dilute, water down, thin, blunt, mitigate, deplete, soften, soften up
ANTONYMS

increase, boost

3‘our morale weakened’

SYNONYMS
abate, lessen, decrease, dwindle, diminish, ease up, let up, trail off, wane, ebb, subside, peter out, melt away, fizzle out, taper off, tail off, grow dim, grow faint
decline, deteriorate, degenerate, shrivel, wilt, tire, languish, falter
ANTONYMS

strengthen, intensify

4‘the move weakened her authority’

SYNONYMS
impair, undermine, compromise
invalidate, refute, rebut, negate, discredit
ANTONYMS

strengthen, bolster

5‘when she wept and begged him not to turn her out he weakened’

SYNONYMS
relent, give in, acquiesce, yield, give way, accede, succumb, come round
consent, assent, agree
soften, bend, ease up, ease off
ANTONYMS

stand firm