ichidan verb, transitive verb
cause to break up; destroy a relationship
Causative of 別れる (to part, to separate). Used when someone or something causes a couple, friends, or group to split up.
彼の浮気が二人を別れさせた。
His affair caused the two of them to break up.
親が無理やり二人を別れさせようとした。
The parents tried to force the two apart.