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):

joylessness
    n 1: a feeling of dismal cheerlessness

Moby Thesaurus II by Grady Ward, 1.0:

73 Moby Thesaurus words for "joylessness":
   angst, anguish, anxiety, bitterness, bleakness, boredom,
   cheerlessness, comfortlessness, depression, discomfort,
   discomposure, discontent, dislike, dismalness, displeasure,
   disquiet, dissatisfaction, distress, distressfulness, dread,
   dreariness, dullness, emptiness, ennui, existential woe, flatness,
   grief, grievousness, grimness, humorlessness, infelicity,
   infestivity, inquietude, lack of pleasure, lamentability,
   lamentation, malaise, mirthlessness, misery, mournfulness, nausea,
   nongratification, nonsatisfaction, pain, painfulness, pathos,
   pitiability, pitiableness, pitifulness, poignancy, regrettableness,
   sadness, savorlessness, sharpness, sorrowfulness, spleen,
   staleness, tastelessness, tediousness, tedium, uncheerfulness,
   uncomfortableness, unease, uneasiness, unhappiness, unjoyfulness,
   unmirthfulness, unpleasure, unsatisfaction, vexation of spirit,
   woebegoneness, woefulness, wretchedness