irrefragable

From Latin irrefrāgābilis, from refrāgor (“oppose, contest”).

• (UK, US) IPA^(key): /ɪˈɹɛfɹəɡəb(ə)l/

irrefragable (comparative more irrefragable, superlative most irrefragable)

1. Which cannot be refuted; indisputable, clearly right, incontrovertible. [from 16th c.]
   • 1885, Charlotte M. Yonge, Nuttie's Father, ch. 20:

     Bulfinch, a solicitor at Redcastle, came to him with irrefragable proofs of gross peculation on the part of the bailiff.

   • 1913, Jack London, John Barleycorn, ch. 19:

     [W]e didn't. That is the irrefragable fact. We didn't.

   • 2001 Jan. 14, Harold Evans, "Bookend: White House Book Club," New York Times (retrieved 18 Nov 2012):

     Lionel Trilling has cautioned us that an idea derived from reading is not a unitary, irrefragable thing but something modified in its transmission.

• (which cannot be refuted): incontestable, incontrovertible, indisputable, indubitable, irrefutable, unanswerable, undeniable, unquestionable

• irrefragability
• irrefragably
• refragable