止めてやる

I'll stop ...

→ 止める

phrase Rare #38,681

I'll stop ... The ending やる can mean doing something for someone, but in rough or threatening speech it often adds a forceful “I'll do it” tone.

JA: 俺が必ずあいつを止めてやる。

EN: I'll stop him for sure.

I'll stop you.

— ファイト・クラブ (1999)