Nouns

(n)duty, responsibility, obligationthe social force that binds you to the courses of action demanded by that force“we must instill a sense of duty in our children”, “every right implies a responsibility; every opportunity, an obligation; every possession, a duty” (John D.Rockefeller Jr)
(n)dutywork that you are obliged to perform for moral or legal reasons“the duties of the job”
(n)duty, tariffa government tax on imports or exports“they signed a treaty to lower duties on trade between their countries”