obligatory

US /əˈblɪɡ.ə.tɔːr.i/
UK /əˈblɪɡ.ə.tɔːr.i/
"obligatory" picture
1.

obligatorio, imperativo, forzoso

required by a legal, moral, or other rule; compulsory.

:
It is obligatory for all students to wear uniforms.
Es obligatorio para todos los estudiantes usar uniformes.
Attendance at the meeting is obligatory for all staff.
La asistencia a la reunión es obligatoria para todo el personal.
2.

obligatorio, formal, de rigor

(of a person or their behavior) done to conform to social or legal requirements rather than from genuine desire or interest.

:
He gave an obligatory smile, clearly not amused.
Dio una sonrisa obligatoria, claramente no divertido.
The polite applause was merely obligatory.
El aplauso cortés fue meramente obligatorio.