mil·i·tate (mĭl'ĭ-tāt') intr.v.
mil·i·tat·ed, mil·i·tat·ing, mil·i·tates To have force or influence; bring about an effect or a change: "All these factors militated to a different targeting priority"(Tom Clancy)."The chaste banality of his prose . . . militates against the stories' becoming literature"(Anthony Burgess).
[Latin mīlitāre, mīlitāt-, to serve as a soldier, from mīles, mīlit-, soldier.]
1625, "to serve as a soldier," from L. militatum, pp. of militare "serve as a soldier," from miles "soldier" (see military). Sense developed via "conflict with," to "be evidence" (for or against), 1642.