'unearth' originates from Middle English, specifically the prefix 'un-' meaning 'not' and 'earth' meaning 'soil or ground'.

'unearth' changed from the Middle English word 'unerthe' and eventually became the modern English word 'unearth'.

Initially, it meant 'to remove from the earth', but over time it evolved into its current meaning of 'to discover or reveal something hidden'.