Ir-rĕf'ra-ga-ble, a.

a. [Prefix in, not, and refragable; Fr. irréfragable, Sp. irrefragable, It. irrefragabile.] Not refragable; not to be refuted or overthrown; incontestable; undeniable; as, an irrefragable argument; irrefragable reason or evidence.

Synonyms— Incontrovertible; unanswerable; indisputable; unquestionable; incontestable; indubitable; undeniable; irrefutable.