don't tell him
Don't tell him the truth.
Не говори ему, что ты полицейский.
Don't tell him you're a police officer.
You'd better not tell him.
Don't tell him that!
Нет, лучше не говори ему ничего.
No, it’s better not to tell him anything.
— Женщины на грани нервного срыва (1988)
Не говори ему, сколько мне лет.
Don't tell him how old I am.
Don't tell him that.