/ rɪˈbʌt; NAmE / verb
( -tt- ) [ vn ] ( formal ) to say or prove that a statement or criticism is false
SYN refute
► re·but·tal / -tl; NAmE / noun [ C , U ]:
The accusations met with a firm rebuttal.
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WORD ORIGIN
Middle English (in the senses rebuke and repulse ): from Anglo-Norman French rebuter , from Old French re- (expressing opposition) + boter to butt. The current sense (originally a legal use) dates from the early 19th cent.