n. 25B6; noun
his professional obligations : DUTY, commitment, responsibility; function, task, job, assignment, commission, burden, charge, onus, liability, accountability, requirement, debt; archaic devoir.
a sense of obligation : DUTY, compulsion, indebtedness; duress, necessity, pressure, constraint.
25A0; under an obligation BEHOLDEN, obliged, in someone's debt, indebted, obligated, owing someone a debt of gratitude, duty-bound, honour-bound.