tōu​tīng

eavesdrop

偷听 (偷聽) tōu​tīng
eavesdrop verb
to listen secretly to a private conversation

Don't hide behind the door and eavesdrop on others.

monitor verb
to intercept or listen in on communications or signals covertly

The enemy is eavesdropping on our radio channel.

Frequency

Movie subtitles
6.32 per million appears in 3% of films
Written text
1.11 per million

Sources

Definitions
CC-CEDICT