An indispensable item; a requirement.

Compensation for loss or damage; amends. / Retaliation or reprisal; vengeance. / Repayment, reward, recompense, return in kind.

A formal demand made by one state or government upon another for the surrender or extradition of a fugitive from justice. / (law) A notarial demand for repayment of a debt.

(transitive) To demand something, especially for a military need of staff, supplies, or transport.

(transitive) To return (usually something figurative) that has been given; to repay; to recompense

requital

(computing) a parameter (in some file systems) that specifies the storage space required for a new file

A condition or capability that a system, person or object has to satisfy, fulfill or comply with. / (computing) Any of the functions of a software system, described formally.

(law) A legal document filed in connection with litigation, and describing documents, materials, or information which the opposing party is requested to produce.

(law) A legal document filed in connection with litigation, asking the opposing party to affirm or deny the truth of a statement.