行かせてやれ

let him/her go

→ 行く
phrase Rare #20,635
let him/her go A blunt command meaning to allow someone to leave or make sure they get to go. The ending やれ adds a rough, forceful tone and can imply doing it for the person's benefit.
JA: 彼が行きたがっているなら、行かせてやれ。
EN: If he wants to go, let him go.

その子を行かせてやれ

Let the child go.

— 風の谷のナウシカ (1984)

行かせてやれ行けよニガー

Let him go. Go on, nigger!

— Брат 2 (2000)

彼に我が道を行かせてやれ

Let him go his own way.

行かせてやれ

Let him go.

— パディントン2 (2017)