'foreseeably-unproven' is a compound word formed from 'foreseeably' and 'unproven'. 'Foreseeably' originates from 'foresee', which comes from Old English 'foreseon', meaning 'to see beforehand'. 'Unproven' is derived from 'un-' meaning 'not' and 'proven', which comes from Latin 'probare', meaning 'to test or prove'.

'Foreseeably' evolved from the Old English 'foreseon', while 'unproven' developed from the Latin 'probare'. The combination of these words into 'foreseeably-unproven' is a modern English construct.

Initially, 'foresee' meant 'to see beforehand', and 'unproven' meant 'not tested'. The combination implies something predictably not verified.