com·pul·so·ry 
/kəmˈpʌlsəri/ adjective
/kəmˈpʌlsəri/ adjective 1 : required by a law or rule
▪ compulsory [=mandatory] education/retirement 2 : having the power of forcing someone to do something
▪ a compulsory law
▪ compulsory [=mandatory] education/retirement
▪ a compulsory law
— com·pul·so·ri·ly /kəmˈpʌlsərəli/ adverb
/kəmˈpʌlsərəli/ adverb
