"glum" in the adjective sense
1. glum
moody and melancholic
2. dark, dour, glowering, glum, moody, morose, saturnine, sour, sullen
showing a brooding ill humor
"a dark scowl"
"the proverbially dour New England Puritan"
"a glum, hopeless shrug"
"he sat in moody silence"
"a morose and unsociable manner"
"a saturnine, almost misanthropic young genius"- Bruce Bliven
"a sour temper"
"a sullen crowd"
Source: WordNet® (An amazing lexical database of English)
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