1) Act upon 2) Have effect, pro or con 3) Have force or influence 4) Influence 5) To fight 6) To influence 7) Weigh heavily 8) Work 
• (v. i.) To make war; to fight; to contend; -- usually followed by against and with.
Mil'i·tate intransitive verb [ imperfect & past participle Militated ; present participle & verbal noun Militating .] [ Latin militare , militatum , to be a soldier, from miles , militis , soldier.] To make ...
[v] - have force or influence
militate 1. To have a substantial effect upon; to weigh heavily. 2. To be a powerful or conclusive factor in preventing something. 3. To have an influence, especially a negative one, on something. Related 'war, war-like' or 'battle' word units: areo-; belli-; -machy.
have force or influence; bring about an effect or change