Main Entry: ir·re·fra·ga·ble

Pronunciation: \i-ˈre-frə-gə-bəl, ˌi(r)-; ˌir-i-ˈfra-gə-\

Function: adjective

Etymology: Late Latin irrefragabilis, from Latin in- + refragari to oppose, from re- + -fragari (as in suffragari to vote for); akin to Latin suffragium suffrage

Date: 1533

1 : impossible to refute <irrefragable arguments>
2 : impossible to break or alter <irrefragable rules>

— ir·re·fra·ga·bil·i·ty \i-ˌre-frə-gə-ˈbi-lə-tē, ˌi(r)-; ˌir-i-ˌfra-gə-\ noun

— ir·ref·ra·ga·bly \i-ˈre-frə-gə-blē, ˌi(r)-; ˌir-i-ˈfra-gə-\ adverb