'unverifiable' originates from the prefix 'un-' meaning 'not' and the word 'verifiable', which comes from the Latin 'verificare', where 'verus' meant 'true' and 'facere' meant 'to make'.

'verificare' transformed into the Old French word 'verifier', and eventually became the modern English word 'verify', with 'unverifiable' being a negation of this.

Initially, 'verificare' meant 'to make true', and 'unverifiable' evolved to mean 'not able to be proven true'.