to disagree with something or someone, often by speaking or fighting against it, him, or her

The proposed new testing system has been vigorously opposed by teachers. 实行新考试制度的提议遭到了教师们的强烈反对。

Most of the local residents opposed the closing of the school. 当地大多数居民反对关闭这所学校。

[ + -ing verb ] I would certainly oppose changing the system. 我当然会反对改变这一制度。