compulsory
adj.adj. required by a law or a rule. If something is compulsory, you must do it and you do not have a choice.
adj. obligatory by virtue of a law, rule, or directive. Often used in administrative or educational contexts to describe requirements that cannot be waived.
Math is a compulsory subject in high school.
The government made it compulsory for all citizens to carry identification when traveling between provinces.
While the seminar is technically optional, the department head strongly suggested that attendance is effectively compulsory for those seeking a promotion this year.
Borrowed from Late Latin compulsorius, from Latin compulsus. Displaced native Old English ġenīedelīċ.
Typically functions as an attributive adjective before a noun or as a predicative adjective following a linking verb.
it is compulsory to doingit is compulsory to doWhen followed by an action, this adjective requires a to-infinitive, not a gerund.