إذا قلت إن على شخص ما التزامًا بفعل شيء ما أو واجب القيام بشيء ما ، فأنت تقصد أنه يجب عليه القيام بذلك ، لأن هذه مسؤوليته. ... عندما يقوم المعلمون بتعيين واجبات منزلية ، يشعر الطلاب عادةً بالالتزام بأدائها. ربما كان من واجبه أن يخبر الشرطة بما رآه
If you say that someone has an obligation to do something or a duty to do something, you mean that they ought to do it, because it is their responsibility. ... When teachers assign homework, students usually feel an obligation to do it. Perhaps it was his duty to tell the police what he had seen