Etymology
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indisputable (adj.)

1550s, from Late Latin indisputabilis, from in- "not, opposite of, without" (see in- (1)) + disputabilis, from Latin disputare "to weigh, examine, discuss, argue, explain" (see dispute (v.)). Related: Indisputably.

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Definitions of indisputable

indisputable (adj.)
not open to question; obviously true;
indisputable evidence of a witness
indisputable (adj.)
impossible to doubt or dispute;
indisputable (or sure) proof
Synonyms: sure
From wordnet.princeton.edu