shǔ​diǎn​wàng​zǔ

to forget one's roots

Senses

数典忘祖/ 數典忘祖 shǔ​diǎn​wàng​zǔ to forget one's roots

To recount history but forget one's own ancestors; describes forgetting one's origins, being ungrateful, or being ignorant of one's own country's history.

References

antonym 数典忘祖/數典忘祖 饮水思源/飲水思源