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):

joyless
    adj 1: not experiencing or inspiring joy; "a joyless man"; "a
           joyless occasion"; "joyless evenings" [ant: joyous]

Moby Thesaurus II by Grady Ward, 1.0:

104 Moby Thesaurus words for "joyless":
   affecting, afflictive, anguished, anxious, austere, bitter, black,
   bleak, bored, cheerless, comfortless, crestfallen, dejected,
   deplorable, depressant, depressed, depressing, depressive,
   desolate, despondent, discomforting, disconsolate, discontented,
   disgusted, disheartened, disheartening, dismal, dismaying,
   dispirited, dispiriting, distressful, distressing, doleful,
   dolorific, dolorogenic, dolorous, down, downcast, downhearted,
   dreary, gloomy, grief-stricken, grievous, grim, heartsick,
   humorless, in bad humor, inconsolable, infestive, inhospitable,
   lamentable, lugubrious, melancholic, melancholy, mirthless,
   miserable, morose, mournful, moving, nauseated, nauseous,
   oppressive, out of humor, out of sorts, painful, pathetic, piteous,
   pitiable, pleasureless, poignant, prey to malaise, regrettable,
   repelled, revolted, rueful, sad, saddened, saddening, severe,
   sharp, sickened, somber, sore, sorrowful, sorry, sorryish,
   suffering angst, touching, triste, uncheerful, uncheery,
   uncomfortable, uneasy, unfulfilled, ungratified, unhappy, unjoyful,
   unmirthful, unquiet, unsatisfied, unsmiling, woebegone, woeful,
   wretched