How do you spell Rebut

Available Definitions:
1)  v. t. - To drive or beat back; to repulse.
2)  v. t. - To contradict, meet, or oppose by argument, plea, or countervailing proof.
3)  v. i. - To retire; to recoil.
4)  v. i. - To make, or put in, an answer, as to a plaintiff's surrejoinder.