The Collaborative International Dictionary of English v.0.48:

Joyless \Joy"less\, a.
   Not having joy; not causing joy; unenjoyable. --
   Joy"less*ly, adv. -- Joy"less*ness, n.
   [1913 Webster]

         With downcast eyes the joyless victor sat. --Dryden.
   [1913 Webster]

         Youth and health and war are joyless to him. --Addison.
   [1913 Webster]

         [He] pining for the lass,
         Is joyless of the grove, and spurns the growing grass.
                                                  --Dryden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

joylessly
    adv 1: in a joyless manner; without joy; "she greeted her guests
           joylessly" [ant: gleefully, joyfully, joyously]