'atomic-armed' originates from the combination of 'atomic,' derived from the Greek word 'atomos,' meaning 'indivisible,' and 'armed,' from Old English 'gearmian,' meaning 'to equip or prepare for battle.'

'atomic' evolved from the Greek 'atomos' through Latin 'atomicus,' while 'armed' transformed from Old English 'gearmian' to the modern English 'armed.'

Initially, 'atomic' referred to the indivisible nature of atoms, but over time it evolved to relate to nuclear energy and weaponry, while 'armed' has consistently meant equipped for battle.