FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

strateuomai στρατεύω — strat-yoo'-om-ahee — middle voice from the base of 4756; to serve in a military campaign; figuratively, to execute the apostolate (with its arduous duties and functions), to contend with carnal inclinations:--soldier, (go to) war(-fare).

see GREEK for 4756