Opposite words for swift:
inactive, dragging, dawdling, unhurried, clumsy, languid, inert, slowish, laggard, dillydallying, slow, tardy, deliberate, dallying, ultraslow, lingering, leisurely, poking, late, unready, dilatory, crawling, measured, sluggish, poky, plodding, dull, heavy.
Usage samples:
  1. For now, on the great sea, a swift fleet is gathering.
    "The Roman Poets of the Republic", W. Y. Sellar.
  2. Come, and I will start ye on the swift trail to your own country, and ye shall come here no more."
    "Parables Of A Province", Gilbert Parker Last Updated: March 13, 2009.
  3. Then, with a swift change of hold, the youngster took Jim in a wrestler's grip, one he had learned from his father.
    "The Boy With the U.S. Miners", Francis Rolt-Wheeler.
  4. Just think, Mr. Swift!
    "Tom Swift among the Fire Fighters or, Battling with Flames from the Air", Victor Appleton.