я не дам ему

I won't let him

→ я
phrase Uncommon #19,430
I won't let him Usually followed by an infinitive: я не дам ему уйти means “I won't let him leave.” дам is the first-person singular future form of дать, “to give,” but this construction means “to allow” or “to let.”
RU: Я не дам ему обидеть тебя.
EN: I won't let him hurt you.

Я не дам ему вас в обиду.

I won’t let him hurt you.

Я не дам ему умереть.

I won't let him die.

Я не дам ему денег.

I won't give him any money.

Я не дам ему умереть!

I won't let him die!

— Истребитель демонов: Поезд «Бесконечный» (2020)

Я не дам ему вмешаться.

I won't let him interfere.

Я не дам ему снова сюда прийти.

I won't let him come here again.