liǎo​ruò​zhǐ​zhǎng

to know something inside out

了若指掌 瞭若指掌 liǎo​ruò​zhǐ​zhǎng
to know something inside out
to know something or someone extremely well, as if looking at things on the palm of one's hand; to know like the back of one's hand

Frequency

Written text
0.132 per million

Cross-References

Same as

Sources

Frequency data
BCC Corpus (BLCU)