'unexpectedly-altered' originates from the combination of 'unexpectedly' and 'altered'. 'Unexpectedly' comes from 'unexpected', which is derived from the Latin 'exspectare', meaning 'to look out for'. 'Altered' comes from the Latin 'alterare', meaning 'to change'.

'unexpectedly' changed from the Old French word 'unexpected' and 'altered' from the Latin 'alterare', eventually becoming the modern English word 'unexpectedly-altered'.

Initially, 'unexpectedly' meant 'not expected', and 'altered' meant 'changed'. Over time, the combination evolved to mean 'changed in an unforeseen manner'.