The Collaborative International Dictionary of English v.0.48:

Worthless \Worth"less\, a. [AS. weor[eth]le['a]s.]
   Destitute of worth; having no value, virtue, excellence,
   dignity, or the like; undeserving; valueless; useless; vile;
   mean; as, a worthless garment; a worthless ship; a worthless
   man or woman; a worthless magistrate.
   [1913 Webster]

         'T is a worthless world to win or lose.  --Byron.
   [1913 Webster] -- Worth"less*ly, adv. -- Worth"less*ness,
   n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

worthlessly
    adv 1: in a worthless manner