obligatory
Translation
obligatory, compulsory, mandatory
Examples
Attendance at the meeting is obligatory.
Attendance at the meeting is obligatory.
It is obligatory for all employees to wear a helmet.
It is obligatory for all employees to wear a helmet.
Grammar Patterns
((sth.)) is obligatory (sth.) is required by rule Attendance at the meeting is obligatory.
It is obligatory ((for sb.)) ((to-inf)) It is required for (sb.) to do (sth.) It is obligatory for all employees to wear a helmet.
Similar Words
Synonyms: mandatory, compulsory, required; Antonyms: optional, voluntary
Etymology
From Latin 'obligare' (to bind), from 'ob-' (to) + 'ligare' (to bind).
Memory Tips
Think of the word 'obligation'. If something is obligatory, you have an obligation to do it.