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irrebuttable

[ir-i-buht-uh-buh l]
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adjective
  1. incapable of being rebutted or refuted.
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Origin of irrebuttable

First recorded in 1825–35; ir-2 + rebuttable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

undeniableironcladunassailableindisputableaccuratecertainevidentfinalincontrovertibleindubitableinvincibleirresistibleobviouspositivesetsureunimpeachableunquestionableinarguableincontestable