'toothed' originates from Old English, specifically the word 'tōþ', where 'tōþ' meant 'tooth'.

'tōþ' changed from Old English word 'tōþ' and eventually became the modern English word 'tooth', with 'toothed' as its adjective form.

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