'disputatious' originates from Latin, specifically the word 'disputatio,' where 'dis-' meant 'apart' and 'putare' meant 'to think.'

'disputatio' transformed into the French word 'disputation,' and eventually became the modern English word 'disputatious' through Middle English.

Initially, it meant 'to think apart or consider,' but over time it evolved into its current meaning of 'inclined to argue or debate.'