戒 （カイ） admonition, commandment, sila (precept)

戒厳令 （カイゲンレイ） martial law

懲戒 （チョウカイ） discipline, punishment, reprimand

自戒 （ジカイ） self-admonition

戒める （いましめる） to warn against, to caution against, to admonish, to scold, to rebuke, to prohibit, to forbid, to ban, to be cautious, to detest, to loathe, to punish