spy on
US /spaɪ ɑːn/
UK /spaɪ ɑːn/

1.
spiare, sorvegliare
to secretly watch someone or something, especially to obtain information
:
•
The government was accused of trying to spy on its own citizens.
Il governo è stato accusato di cercare di spiare i propri cittadini.
•
She felt like someone was spying on her.
Si sentiva come se qualcuno la stesse spiando.
: