'unforeseenly-refuted' is a compound word formed from 'unforeseenly' and 'refuted'. 'Unforeseenly' originates from 'unforeseen', which is derived from 'un-' meaning 'not' and 'foreseen', the past participle of 'foresee', meaning 'to see beforehand'. 'Refuted' comes from Latin 'refutare', meaning 'to repel or rebut'.

'Unforeseenly' evolved from the Old English 'unforeseon', while 'refuted' evolved from the Latin 'refutare'. The combination of these words into 'unforeseenly-refuted' is a modern construct.

Initially, 'refuted' meant 'to repel or rebut', but over time it evolved to mean 'to disprove'. 'Unforeseenly' has maintained its meaning of 'unexpectedly'.