ir·re·fra·ga·ble | \i-ˈre-frə-gə-bəl, ˌi(r)-;ˌir-i-ˈfra-gə-\

Definition of irrefragable 

1 : impossible to refute irrefragable arguments

2 : impossible to break or alter irrefragable rules

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Other Words from irrefragable

irrefragability \i-ˌre-frə-gə-ˈbi-lə-tē, ˌi(r)-; ˌir-i-ˌfra-gə- \ noun
irrefragably \i-ˈre-frə-gə-blē, ˌi(r)-; ˌir-i-ˈfra-gə- \ adverb

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Since at least 1533, irrefragable has been used as an English adjective modifying things (such as arguments or data) that are impossible to refute. It derives from the Late Latin adjective irrefragabilis (of approximately the same meaning), which is itself derived from the Latin verb refragari, meaning "to oppose or resist." Irrefragable rather quickly developed a second sense referring to things (such as rules, laws, and even objects) that cannot be broken or changed. There was once also a third sense that applied to inflexible or obstinate people.

Examples of irrefragable in a Sentence

the prosecutor painstakingly built an irrefragable case

First Known Use of irrefragable

1533, in the meaning defined at sense 1

History and Etymology for irrefragable

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

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The first known use of irrefragable was in 1533

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