See downhearted in Webster's New World Roget's A-Z Thesaurus II
adjective
In low spirits:
blue, dejected, depressed, desolate, dispirited, down, downcast, dull, dysphoric, gloomy, heavy-hearted, low, melancholic, melancholy, sad, spiritless, tristful, unhappy, wistful. Idiom: down at (or in) the mouth. See happy
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