1. to work (for, at, in); to be employed (at); to serve (as)
ここは、長く勤める者が多くおります。Many people work here for a long time.
2. to finish (a term); to serve (e.g. a sentence); to serve out (e.g. an apprenticeship)
3. to conduct (a ceremony); to perform (a Buddhist memorial service)
4. to practice (Buddhist teachings); to study (Buddhism)