'weaponless' originates from Old English, specifically the word 'wǣpenleas,' where 'wǣpen' meant 'weapon' and '-leas' meant 'without.'

'wǣpenleas' transformed into the Middle English word 'wepenles,' and eventually became the modern English word 'weaponless.'

Initially, it meant 'without weapons,' and this meaning has largely remained the same in modern usage.