'missile-free' originates from the English word 'missile' combined with the suffix '-free', where 'missile' refers to a projectile weapon and '-free' indicates absence.

'missile' comes from the Latin word 'missilis', meaning 'that may be thrown', and 'free' from Old English 'freo', meaning 'not in bondage'.

Initially, 'missile' referred to any thrown object, but now it specifically means a weapon. 'Free' has consistently meant 'without'.