Parley

Part of speech: noun (n.)

Mutual discourse or conversation; discussion; hence, an oral conference with an enemy, as with regard to a truce. We yield on parley, but are stormed in vain. Dryden. To beat a parley (Mil.), to beat a drum, or sound a trumpet, as a signal for holding a conference with the enemy.

Part of speech: verb (v.)

To speak with another; to confer on some point of mutual concern; to discuss orally; hence, specifically, to confer orally with an enemy; to treat with him by words, as on an exchange of prisoners, an armistice, or terms of peace. They are at hand, To parley or to fight; therefore prepare. Shak.