enjoin
/ɪnˈdʒɔɪn; ɪn`dʒɔɪn/ v[Tn, Tn.pr, Tf, Dn.t]
~ sth (on sb) (fml or law 文或律) impose (an action or prohibition) on sb; order 将（一行动或禁令）强施於某人; 命令
He enjoined obedience on his followers. 他强迫随从服从.
The leader enjoined that the rules should be obeyed. 那位领导人命令必须遵守这些规则.