'evert' originates from Latin, specifically the word 'evertere', where 'e-' (from 'ex-') meant 'out' and 'vertere' meant 'to turn'.

'evert' changed from Late Latin 'evertere' into Medieval/Late Medieval usage (via scholarly Latin) and entered English in the modern period as the verb 'evert' and related adjective/past forms such as 'everted'.

Initially it meant 'to turn out or overturn' (often with force or destruction); over time the usage broadened to include the physical action 'to turn outward' and the descriptive adjective 'everted' meaning 'turned outward'.