无效

無效

wúxiào

adjective HSK 6 #4,861

Meanings

1 ineffective; invalid; null and void

Characters

without; none; not

effect; result; to imitate

Without effect — something that doesn't work or isn't valid.

Examples

这张合同已经无效了。

Zhè zhāng hétóng yǐjīng wúxiào le.

This contract is already invalid.

这种药对他无效。

Zhèzhǒng yào duì tā wúxiào.

This medicine has no effect on him.

过期的票是无效的。

Guòqī de piào shì wúxiào de.

Expired tickets are invalid.

法院宣布选举无效。

Fǎyuàn xuānbù xuǎnjǔ wúxiào.

The court declared the election invalid.

Tips

usage

无效 is the opposite of 有效 (valid/effective). Common collocations: 合同无效 (contract is void), 治疗无效 (treatment was ineffective), 宣布无效 (declare invalid), 无效投票 (invalid ballot).

Stroke Order

无 wú

效 xiào