incumbency

something one must do because of prior agreement few incumbencies of her office are as distasteful to the college president as fund-raising, of which there seems to be no end Synonyms burden, charge, commitment, devoir, do [archaic], duty, imperative, obligation, need, office, responsibilityRelated Words oath, pledge, promise, troth, vow, word; arrangement, prearrangement, setup; compact, contract, covenant, pact, trust; debt, payment, tribute; compulsion, constraint, restraint; must, requirement; coercion, duress, force; appointment, engagement, reservation; burden, onusNear Antonyms grace, postponement, stay; discharge, ease, exemption, release, relief, waiver; loophole; alternative, choice, option, pick, preference, selection