tell no one
Gli ho detto di non dirlo a nessuno.
I told him not to tell anyone.
He/She mustn't tell anyone.
Ti ho detto di non dirlo a nessuno.
I told you not to tell anyone.
Sami non voleva dirlo a nessuno.
Sami didn't want to tell anyone.
Non ha voluto dirlo a nessuno.
He didn't want to tell anyone.
— Y tu mamá también - Anche tua madre (2001)
Stava male quel giorno ma non voleva dirlo a nessuno.
He was feeling sick that day but didn't want to tell anyone.
Io non dovrei dirlo a nessuno.
I shouldn't tell anyone.
Non dirlo a nessuno, incluso Shim Sang-do.
Don't tell anyone, including Shim Sang-do.
— L'impero delle ombre (2016)
Per favore, non dirlo a nessuno.
Please, don't tell anyone.