1) Causing no joy or pleasure 2) Cheerless 3) Funereal 4) Mirthless 5) Sepulchral 6) Sorrowful 7) Unamused 8) Uncheerful 9) Unhappy 10) Unsmiling 11) Without joy or gladness Found on https://www.crosswordclues.com/clue/joyless
Joy'less adjective Not having joy; not causing joy; unenjoyable. -- Joy'less*ly , adverb -- Joy'less*ness , noun « With downcast eyes the joyless victor sat.» Dryden. « Youth and health and war are ... Found on http://www.encyclo.co.uk/webster/J/13