'unplowed' originates from the prefix 'un-' meaning 'not' and the word 'plowed', which comes from Old English 'plōg' meaning 'plow'.

'plōg' transformed into the Middle English word 'plow', and eventually became the modern English word 'plowed'.

Initially, 'plow' meant 'to turn over soil', and 'unplowed' has consistently meant 'not turned over'.