adj. 25B6; adjective
a joyless man : GLOOMY, melancholy, morose, lugubrious, glum, sombre, saturnine, sullen, dour, humourless.
a joyless room : DEPRESSING, cheerless, gloomy, dreary, bleak, dispiriting, drab, dismal, desolate, austere, sombre; unwelcoming, uninviting, inhospitable; poetic/literary drear.
cheerful, welcoming.