既得利益

Already; since; both... and...; indicates a connection between preceding and succeeding situations; also used as a surname.

Structural particle linking verb/adjective to effect or degree; to obtain, get, gain; suitable; proud; contented; to allow; must, ought to.

Advantage; benefit; profit; interest; sharp; favorable; to do good to; surname.

Benefit; profit; advantage; to increase; to add; to help; all the more; surname.