Coercive describes a person, a rule, or an action that uses threats or hard orders to make people do something they do not want to do. A coercive law does not try to talk you into it; it says you must, or something bad will follow. People also call a boss, a parent, or a partner coercive when they control others by fear, not by respect. It is formal, like coercion. News and law like the phrase "coercive measures" — strong steps a government takes to force a result. Though actually, in ordinary talk most people would just say forceful, strict, or bullying. If you use coercive about a friend who is only being a bit pushy, it will sound too heavy, as if you are accusing them of real force.