Meaning

verb lend a military character to (a country), as by building up a military force

verb adopt for military use

originEtymology tree English military Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō)bor. Late Latin -izōder. Middle French -iserbor. Middle English -isen English -ize English militarize From military + -ize.

Etymology from Wiktionary, CC BY-SA 3.0