How common it is
无效 appears often in everyday Chinese, so it is worth practicing early and reviewing often.
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Pronunciation focus
Say wúxiào slowly first, then repeat it in a short phrase. Listen for the tone shape.
Usage note
无效的意思是没用或不起作用，比如一张过期的票。
Wúxiào de yìsi shì méiyòng huò bù qǐ zuòyòng, bǐrú yī zhāng guòqī de piào.
Invalid means useless or not working, like an expired ticket.
Context note
如果密码错误，登录就会无效，需要重新输入。
Rúguǒ mìmǎ cuòwù, dēnglù jiù huì wúxiào, xūyào chóngxīn shūrù.
If the password is wrong, the login will be invalid and needs to be re-entered.
5 examples
这张票已经无效了。
zhè zhāng piào yǐ jīng wú xiào le。
This ticket is already invalid.
错误的答案无效。
cuò wù de dá àn wú xiào。
Wrong answers are invalid.
这个游戏规则无效。
zhè ge yóu xì guī zé wú xiào。
This game rule is invalid.
过期的东西无效。
guò qī de dōng xī wú xiào。
Expired things are invalid.
他的申请无效。
tā de shēn qǐng wú xiào。
His application is invalid.
5 mini stories
小刚的优惠券过期了。它已经无效了。
xiǎo gāng de yōu huì quàn guò qī le。 tā yǐ jīng wú xiào le。
Xiao Gang's coupon expired. It is already invalid.
无效的密码不能登录。小明重新试了一次。
wú xiào de mì mǎ bù néng dēng lù。 xiǎo míng chóng xīn shì le yí cì。
An invalid password cannot log in. Xiao Ming tried again.
这张旧地图无效了。我们买了新的。
zhè zhāng jiù dì tú wú xiào le。 wǒ men mǎi le xīn de。
This old map is invalid. We bought a new one.
无效的考试答案会扣分。小红认真检查了。
wú xiào de kǎo shì dá àn huì kòu fēn。 xiǎo hóng rèn zhēn jiǎn chá le。
Invalid exam answers will deduct points. Xiao Hong checked carefully.
游戏中的无效操作被忽略了。大家继续玩。
yóu xì zhōng de wú xiào cāo zuò bèi hū lüè le。 dà jiā jì xù wán。
Invalid operations in the game were ignored. Everyone continued playing.