re·but 
(rĭ-bŭt)
(rĭ-bŭt)v. re·but·ted, re·but·ting, re·buts
v.tr.
1. To refute, especially by offering opposing evidence or arguments, as in a legal case: rebut an allegation.
2. To repel or reject: She rebutted his advances.
v.intr.
To present opposing evidence or arguments.
[Middle English reboten, rebutte, to rebuke, repel, from Old French rebouter : re-, re- + bouter, to push (of Germanic origin; see bhau- in the Appendix of Indo-European roots).]