相关单词近义词 annul 废除, invalidate 使无效, quash 镇压, cancel out 消除, abolish 废除, reverse 逆转, abort 流产, negative 否定的, void 空的, avoid 避免, neutralise 中和(使 ... 中立..., negate 否定, neutralize 使中立临近词Num, null, nullify a contract, nullify an election, nullify one's efforts, nullify a prohibition, nullify the registration, nullify one's registration 返回 nullifies