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dreary 
1 bleak, cheerless, comfortless, depressing, dismal, doleful, downcast, drear, forlorn, funereal, gloomy, glum, joyless, lonely, lonesome, melancholy, mournful, sad, solitary, sombre, sorrowful, wretched 
2 as dry as dust, boring, colourless, drab, dull, ho-hum  (informal) humdrum, lifeless, mind-numbing, monotonous, routine, tedious, tiresome, uneventful, uninteresting, wearisome 
 
Antonyms  
 bright, cheerful, happy, interesting, joyful