listen in
US /ˈlɪs.ən ɪn/
UK /ˈlɪs.ən ɪn/

1.
mencuri dengar, menguping
to listen to a private conversation between other people, without them knowing that you are listening
:
•
I caught my sister trying to listen in on my phone call.
Saya menangkap kakak saya cuba mencuri dengar panggilan telefon saya.
•
The neighbors often listen in on our conversations.
Jiran-jiran sering mencuri dengar perbualan kami.