60 synonyms for unhappy such as disadvantageous, blue, disappointed, adverse, and blighted. Unhappy is an adjective, and its antonyms are happy and cheerful.
Blue, broken-hearted, cheerless, crestfallen, dejected, depressed, despairing, despondent, disconsolate, dispirited, doleful, down, down in the dumps, down in the mouth, downcast, downhearted, fed up, forlorn, gloomy, glum, grumpy, heartbroken, heavy-hearted, joyless, lachrymose, long-faced, melancholy, miserable, morose, mournful, out of sorts, regretful, sad, sorrowful, tearful, woebegone, and woeful.
Disappointed, disapproving of, discontented, disgruntled, displeased, dissatisfied, and not best pleased.
Adverse, blighted, disadvantageous, doomed, hapless, ill-fated, ill-omened, ill-starred, jinxed, luckless, miserable, star-crossed, unfortunate, unlucky, and wretched.