'each' originates from Old English, specifically the word 'ǣlc', where 'ǣ-' meant 'ever' and '-lc' meant 'like'.

'ǣlc' changed from the Old English word 'ǣlc' and eventually became the modern English word 'each'.

Initially, it meant 'every one', and this meaning has largely remained the same in modern usage.