'unexpectedly-taken' originates from the combination of 'unexpectedly' and 'taken'. 'Unexpectedly' comes from 'unexpected', which is derived from Latin 'ex-' meaning 'out of' and 'pectare' meaning 'to look'. 'Taken' is the past participle of 'take', which comes from Old English 'tacan', from Old Norse 'taka'.

'Unexpectedly' evolved from the Latin 'ex-' and 'pectare', while 'taken' evolved from Old Norse 'taka'. The combination of these words into 'unexpectedly-taken' is a modern English construct.

Initially, 'unexpectedly' meant 'not foreseen', and 'taken' meant 'seized or acquired'. Together, they convey the idea of something being acquired without prior anticipation.