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English definition of “incontestable”

incontestable

adjective uk   /ˌɪn.kənˈtes.tə.bl̩/ formal us  
impossible to question because of being obviously true: There is now incontestable evidence that the killings did take place.CertaintyConfidence and self-assurance
incontestably
adverb uk   /-bli/ us  
(Definition of incontestable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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