'armings' originates from Modern English, specifically the word 'arming' formed from the verb 'arm' + the suffix '-ing'.

'arm' (the verb) came into English via Old French 'armer' (to arm), which itself derives from Late Latin 'armare' (to furnish with arms), ultimately related to Latin 'arma' (arms, weapons).

Initially it referred to the action of providing weapons ('to furnish with arms'); over time the verbal noun form developed ('arming') and the plural 'armings' denotes multiple acts or instances of this action, retaining the core sense of equipping with weapons.