Dak

n.
  1. Post; mail; also, the mail or postal arrangements; -- spelt also dawk, and dauk.
    2. Dak boat ,
    a mail boat.
    Dak bungalow ,
    a traveler's rest-house at the end of a dak stage.
    To travel by dak ,
    to travel by relays of palanquins or other carriage, as fast as the post along a road.