qiè​tīng

eavesdrop

窃听 (竊聽) qiè​tīng
eavesdrop verb
to listen in secretly to a private conversation

He hid behind the door to eavesdrop on their conversation.

wiretap verb
to intercept and listen to communications using electronic devices

Their phone was wiretapped by the police.

Frequency

Movie subtitles
6.14 per million appears in 2% of films
Written text
1.93 per million

Sources

Definitions
CC-CEDICT