expression, ichidan verb
make someone pay for something; teach someone a lesson
Used when someone is made to suffer consequences for their actions, often as retaliation or punishment. The subject is the person causing the suffering, and the object is the person who suffers.
See also: 痛い目にあう
彼を痛い目にあわせてやる。
I'll make him pay for this.
そんなことをしたら、痛
If you do that, I'll make you regret it.