Irrefragable

Another word I remember coming across for the first time is the word irrefragable. I can't remember exactly the contact but I know it was in B B Warfield. A likely place would be in his book on The Inspiration and Authority of the Bible as here

"The movement of thought is to the effect that, because it is impossible for the Scripture - the term is perfectly general and witnesses to the unitary character of Scripture (it is all, for the purpose in hand, of a piece) - to be withstood, therefore this particular Scripture which is cited must be taken as of irrefragable authority. What we have here is, therefore, the strongest possible assertion of the indefectible authority of Scripture; precisely what is true of Scripture is that it “cannot be broken.”"

Having some knowledge of German and knowing that fragen is the verb to ask, it was not too difficult to guess the meaning of the word.