wú xiào
invalide; nul; en vain; sans résultat
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这张优惠券已经无效了。
Zhè zhāng yóuhuìquàn yǐjīng wúxiào le.
This coupon has expired.
他的签证已经无效了。
Tā de qīnzhuàn yǐjīng wúxiào le.
His visa has expired.
这个方法已经无效了。
Zhège fāngfǎ yǐjīng wúxiào le.
This method is no longer effective.
有效 (yǒuxiào)
valid
有用 (yǒuyòng)
useful
The Chinese word 无效 (wúxiào) is composed of two characters: 无 (wú) and 效 (xiào). 无 means "not" or "without", while 效 means "effect" or "result". Together, 无效 means "ineffective" or "invalid".The character 无 is composed of two parts: 亡 (wáng) and 口 (kǒu). 亡 means "to die" or "to perish", while 口 means "mouth". The combination of these two characters suggests that 无 means "to speak without effect".The character 效 is composed of two parts: 人 (rén) and 交 (jiāo). 人 means "person", while 交 means "to exchange" or "to communicate". The combination of these two characters suggests that 效 means "to produce an effect" or "to achieve a result".The word 无效 is commonly used in Chinese to describe something that is not effective or does not produce the desired result. For example, a medicine that does not cure a disease can be described as 无效. A law that does not prevent crime can also be described as 无效.
