Foot Doctor. A podiatrist is a foot doctor.
duty (a moral or legal obligation)
General A general duty or duties (responsibilities) is/are actions a person must or is expected to perform. For example, society expects parents to exercise certain duties in caring for their...
In UK they are specialists in disorders of the lower limbs and feet
The most important duties of the President are: uphold the law, control the US Military, and keep the peace.