irrefutable
adj.adj. describing something that is so clear or strong that you cannot argue against it. You use this when a fact or proof is impossible to deny.
adj. impossible to deny or disprove; providing a level of evidence that leaves no room for doubt. Often used in legal, scientific, or logical contexts to describe absolute proof.
The DNA evidence was irrefutable and led to a conviction.
The witness provided an irrefutable timeline of events that contradicted the suspect's story.
While the initial data was promising, the researchers needed to find an irrefutable link between the two variables before they could publish their findings in a peer-reviewed journal.
From Late Latin irrefūtābilis, from ir- (“not”) + refūtābilis (“refutable”), from refūtō (“to refute”) + -bilis (“-able”), equivalent to ir- + refutable.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Last updated May 28, 2026