'unexpectedly-moved' originates from the combination of 'unexpectedly' and 'moved', where 'unexpectedly' is derived from 'unexpected', meaning 'not anticipated', and 'moved' from 'move', meaning 'to change position'.

'unexpectedly' changed from the Old English word 'unexpeced' and 'moved' from the Old English 'mōfan', eventually becoming the modern English word 'unexpectedly-moved'.

Initially, 'unexpectedly' meant 'not foreseen', and 'moved' meant 'to change position', and this meaning has largely remained the same in modern usage.