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Đồng nghĩa
ineffective
US
UK
adjective
The anti-crime measures appear to have been ineffective
unproductive
unfruitful
bootless
idle
vain
useless
ineffectual
inefficacious
inoperative
non-functioning
inadequate
insufficient
worthless
The new office manager is totally ineffective
inefficient
incompetent
incapable
unskilled
unskilful
inept
unfit
unproficient
US