'determinable' originates from Latin, specifically the word 'determinabilis,' where 'de-' meant 'down from' and 'terminare' meant 'to limit or bound.'

'determinabilis' transformed into the Old French word 'determinable,' and eventually became the modern English word 'determinable' through Middle English.

Initially, it meant 'capable of being limited or bounded,' but over time it evolved into its current meaning of 'capable of being determined or decided.'