compulsory

compulsory
adjective
  1. required by law or a rule; obligatory
    必须做的;规定的;义务的
    compulsory military service.
    义务兵役。
    it was compulsory to attend mass.
    弥撒是必须要参加的。
    ■involving or exercising compulsion; coercive
    强迫的,强制的
    the abuse of compulsory powers.
    强制权的滥用。
派生
compulsorily
adverb
compulsoriness
noun
语源
  1. early 16th cent. (as a noun denoting a legal mandate which had to be obeyed): from medieval Latin compulsorius, from compuls- 'driven, forced', from the verb compellere (see compel)
英语宝典
考试词汇表