invalidate

第三人称单数：

动词第三人称单数: invalidates

更多词形：

名词: invalidation | 动词过去式: invalidated | 动词过去分词: invalidated | 动词现在分词: invalidating | 动词第三人称单数: invalidates |

单词例句：

She has been tied to the house for weeks looking after her invalid father.

几个星期来她一直呆在家中照顾有病的父亲。

To annul or make void;invalidate.

使废除或使无效；使作废

The Security setting to invalidate version one signatures is set.

已设置使版本签名无效的安全设置。

The invalid brought back all he had eaten.

病人把吃下的东西都吐出来了。

She thought of the old invalid gentleman.

她想起了生病的老先生。

To invalidate(a will)by judicial action.

通过法律手续使（遗嘱）无效

The invalid reached for the glass but could not get it.

病人伸手去拿水杯，但是够不着。

To make ineffective; invalidate.

使无效；使失效

This non sequitur invalidate s his argument.

他不根据前提推理因而论证无效.