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Verb: rebut (rebutted,rebutting)  ri'bút
  1. Overthrow by argument, evidence, or proof
    "The speaker rebutted his opponent's arguments";
    - refute
     
  2. Prove to be false or incorrect
    - refute, controvert

Derived forms: rebuts, rebutted, rebutting

Type of: confute, disown, disprove, renounce, repudiate