negate

1. V-T If one thing negates another, it causes that other thing to lose the effect or value that it had. 使無(wú)效[正式]

These weaknesses negated his otherwise progressive attitude towards the staff. 這些缺點(diǎn)抹殺了他本來(lái)對(duì)工作人員的開(kāi)明態(tài)度。

2. V-T If someone negates something, they say that it does not exist. 否定[正式]

He warned that to negate the results of elections would only make things worse. 他警告說(shuō)否定選舉結(jié)果只能使事態(tài)更加惡化。