armament comes from Latin armamentum ('implement, tackle'), from armare ('to arm, equip'), from arma ('weapons, tools'). The path is chiefly one of transmission: an older form is taken into English, with the word's shape and meaning carried through the language names and forms preserved in the history. In modern use, the noun sense is "military weapons and equipment, or the process of arming for war", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as arm, armaments, army, armada, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Latin armamentum, Latin arma, Proto-Indo-European *h₂er-, which anchor the explanation in named linguistic material.