mō​dǐ

to sound out

摸底 mō//dǐ
to sound out
to investigate or probe to find out the real situation or someone's intentions
to touch the bottom
to reach or feel the bottom (e.g. of a body of water) or the ground
to know the situation
to have a clear understanding or inside knowledge of the facts or someone's background

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
3.19 per million

Sources