yǒu xiào
effective; valid
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这个方法很有效。
Zhège fāngfǎ hěn yǒuxiào.
This method is very effective.
他有有效的证据。
Tā yǒu yǒuxiào de zhèngjù.
He has valid evidence.
这个药很有效。
Zhège yào hěn yǒuxiào.
This medicine is very effective.
无效 (wú xiào)
invalid
无用 (wú yòng)
useless
The Chinese word 有效 (yǒuxiào) is composed of two characters: 有 (yǒu), meaning "to have" or "to exist", and 效 (xiào), meaning "effect" or "result". Together, these characters form the compound word 有效, which means "effective" or "valid".The word 有效 has been used in Chinese for centuries, and its meaning has remained largely unchanged. In modern Chinese, 有效 is commonly used to describe something that is able to produce the desired result or effect. For example, a medicine that is 有效 will be able to cure a disease, and a method that is 有效 will be able to achieve a goal.The word 有效 can also be used in a more general sense to mean "useful" or "beneficial". For example, a person who is 有效 will be able to contribute to society in a positive way.The word 有效 is a versatile word that can be used in a variety of contexts. It is an important word for HSK learners to know, as it is used frequently in both spoken and written Chinese.
