させないぞ

won’t let …

→ 為る

phrase Rare #42,685

won’t let … させない means “won’t let someone do something”; ぞ adds forceful emphasis and can sound masculine or confrontational.

JA: 君にはそんなことをさせないぞ。

EN: I won’t let you do such a thing.

I won't let you become a prostitute!

— ロシアン・ブラザー (1997)

I won't let your admission fee go to waste!

— さらば、わが愛／覇王別姫 (1993)

I won't let you do this!

— アトランティス失われた帝国 (2001)

I won't let you interfere with the experiment.

— es［エス］ (2001)