compulsory

Từ điển Oxford Advanced Learner 8th

com·pul·sory BrE [kəmˈpʌlsəri] NAmE [kəmˈpʌlsəri] adjective
that must be done because of a law or a rule
Syn: ↑mandatory
•It is compulsory for all motorcyclists to wear helmets.
•English is a compulsory subject at this level.
•compulsory education/schooling
•compulsory redundancies
Opp: ↑voluntary
Derived Word: ↑compulsorily

Word Origin:
[compulsorily compulsory] 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, from com- ‘together’ + pellere ‘drive’.

Example Bank:
•It is compulsory for all motorcyclists to wear helmets.
•The strikers are protesting against the threat of compulsory redundancies.
•There is no compulsory education in this part of Africa.

• Từ đồng nghĩa / Synonyms:
  mandatory, required