'quantifiable' originates from the Latin word 'quantificare', where 'quantus' meant 'how much' and 'facere' meant 'to make'.

'quantificare' transformed into the French word 'quantifier', and eventually became the modern English word 'quantify', from which 'quantifiable' is derived.

Initially, it meant 'to make something measurable', and this meaning has largely remained the same in modern usage.