rebut

verb (used with object), re·but·ted, re·but·ting: 1. to refute by evidence or argument. 2. to oppose by contrary proof. verb (used without object), re·but·ted, re·but·ting: 3. to provide some evidence or argument that refutes or opposes. Related words: invalidate, deny, refute, quash, disprove, negate, confound, repulse, top, negative, cross, break, controvert, repel, confute, defeat, overturn, evert, disconfirm. Origin: 1250–1300; Middle English reb(o)uten < Old French rebouter, equivalent to re- re- + bouter butt3. Synonyms: 1 disprove, confute. British dictionary: verb -buts, -butting or -butted: 1. (tr) to refute or disprove, esp by offering a contrary contention or argument. Origin: C13: from Old French reboter, from re- + boter to thrust, butt ³. Source.