bù​zhī​lì​hài

to not know what is good for oneself

Senses

不知利害 bù​zhī​lì​hài to not know what is good for oneself

unable to differentiate good from bad or serious from trivial; to be unable to recognize others' good intentions or the danger of a situation

References

synonym 不知利害/不知利害 不知好歹/不知好歹