'prove' originates from Latin, specifically the word 'probare,' where 'pro-' meant 'for' and 'bare' meant 'to test or try.'

'probare' transformed into the Old French word 'prover,' and eventually became the modern English word 'prove' through Middle English.

Initially, it meant 'to test or try something,' but over time it evolved into its current meaning of 'to demonstrate the truth or existence of something.'