Real Dictionary

enjoin
verb: If a judge enjoins someone from doing something, they order them not to do it. If a judge enjoins an action, they order people not to do it.
verb: If you enjoin someone to do something, you order them to do it. If you enjoin an action or attitude, you order people to do it or have it.

enjoin in American English
to urge or impose with authority; order; enforce
transitive verb: to prescribe (a course of action) with authority or emphasis

enjoin in British English
to order (someone) to do (something); urge strongly; command