有用 (yǒuyòng): useful

Meanings

Having use — useful.

这本书很有用。

Zhè běn shū hěn yǒuyòng.

This book is very useful.

学中文很有用。

Xué zhōngwén hěn yǒuyòng.

Learning Chinese is very useful.

grammar

The opposite is 没用 (useless) or 没有用. Note: 没用 can also mean 'it's no use', as in 'it won't help.'

有 yǒu

用 yòng