'unexpectedly-revised' is a compound word formed from 'unexpectedly' and 'revised'. 'Unexpectedly' originates from the Latin 'ex-' meaning 'out of' and 'spectare' meaning 'to look'. 'Revised' comes from the Latin 'revidere', where 're-' means 'again' and 'videre' means 'to see'.

'Unexpectedly' evolved from the Old French 'unexpected', while 'revised' transformed from the Old French 'reviser', eventually becoming the modern English 'revised'.

Initially, 'unexpectedly' meant 'not foreseen', and 'revised' meant 'looked at again'. Over time, 'unexpectedly-revised' came to mean 'altered without prior notice'.