VERB 妨碍;阻碍 To militate against something means to make it less possible or likely. To militate against someone means to prevent them from achieving something. 妨碍;阻碍 [formal]
Her background militates against her. [VERB + against]
她的背景对她不利。
We can never promise to sail anywhere in particular, because the weather might militate against it. [VERB + against]