不成材bùchéngcáiMeanings1. worthless2. good-for-nothingCharacters used不no成to succeed材materialExamples1就是jiùshì因为yīnwèi他tā不成材bùchéngcái他tā爸bà看不起kànbuqǐ他tā。It's just that because he hasn't made something of himself, his father won't look at him.