"Duty" is a word in LAW AND LEGAL, ENGLISH

In lts use in jurisprudence, this word is the correlative of right. Thus, wherever there exists a right in any person, there also rests a corresponding duty upon

That which a person is bound by moral obligation to do, or
refrain from doing; that which one ought to do; service morally
obligatory.

Hence, any assigned service or business; as, the duties of a
policeman, or a soldier; to be on duty.

Specifically, obedience or submission due to parents and
superiors.

Tax, toll, impost, or customs; excise; any sum of money
required by government to be paid on the importation, exportation, or
consumption of goods.

The efficiency of an engine, especially a steam pumping
engine, as measured by work done by a certain quantity of fuel;
usually, the number of pounds of water lifted one foot by one bushel of
coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100
lbs., United States).

Respect; reverence; regard; act of respect; homage.

That which is due; payment.