walk in on
US /wɑːk ɪn ɑːn/
UK /wɑːk ɪn ɑːn/

1.
دخل على, فاجأ
to enter a room and see someone doing something private or embarrassing
:
•
I accidentally walked in on them while they were changing.
دخلت عليهم بالصدفة بينما كانوا يغيرون ملابسهم.
•
She didn't want anyone to walk in on her while she was practicing her dance moves.
لم تكن تريد أن يدخل عليها أحد بينما كانت تتدرب على حركاتها الراقصة.