'efficiently-altered' originates from the combination of 'efficiently' and 'altered', where 'efficiently' is derived from Latin 'efficientem', meaning 'accomplishing', and 'altered' from Latin 'alterare', meaning 'to change'.

'efficiently' changed from the Latin word 'efficientem' and 'altered' from 'alterare', eventually becoming the modern English phrase 'efficiently-altered'.

Initially, 'efficiently' meant 'accomplishing' and 'altered' meant 'to change', but over time they evolved into their current meaning of 'modified in a productive manner'.