tāo​dǐ

to find out the real situation

掏底 tāo//dǐ
to find out the real situation
To find out the exact details or true state of affairs.
to reveal everything
To disclose everything one knows; to lay all one's cards on the table.
to cut waste rock
To cut away waste rock below a layer of coal.

Frequency

Written text
0.005 per million

Sources

Frequency data
BCC Corpus (BLCU)