(ˈ)i(r)ˈrefrəgəbəl, əˈ-, (ˈ)iəˈ- adjective
Etymology: Late Latin irrefragabilis, from Latin in- in- (I) + refragari to resist, oppose (from re- + -fragari — as in suffragari to vote for, support) + -abilis -able — more at suffrage
1. : impossible to gainsay, deny, or refute
irrefragable arguments
irrefragable data
these irrefragable authorities
2. : impossible to break or alter : inviolable , indestructible
irrefragable rules
an irrefragable cement
• ir·ref·ra·ga·bly -blē adverb