不知好歹
bùzhī-háodǎi
unable to tell good from bad; ungrateful
Every meaning
bùzhī-hǎodǎi
- unable to tell good from bad; ungrateful
Its characters
- 不bùnot; no
- 知zhīto know
- 好hǎogood; nice
- 歹dǎibad; evil
Words with 不
Words with 知
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.