'militaristically' originates from English, specifically formed from the adjective 'militaristic' plus the adverbial suffix '-ally' (modern form '-ally' > '-ically'/'-istically'), where 'militaristic' is built on 'military'.

'militaristically' developed from the English adjective 'militaristic' (formed by adding the suffix '-istic' to 'military'), and 'military' itself comes into English via Old French 'militaire' from Latin 'militaris'. The adverbial form was produced by adding the adverbial ending to create the modern adverb.

Initially related to 'military' in the sense of 'pertaining to soldiers or warfare', it later acquired the evaluative sense of 'favoring military solutions or values', and the adverb now means 'in a militaristic manner.'