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Definition of glowering : 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"

Synonyms:

disconsolate, sinister, dismal, black, threatening, ill-natured, benighted, persistent, lowering, turned, hazardous, saturnine, dingy, off-key, false, darkly, bleak, disastrous, rancid, injurious, harmful, dangerous, forbidding, beatific, off, absent, brooding, sorry, unyielding, temperamental, heavy, coloured, drear, bug-eyed, curious, unsafe, damaging, ruinous, dogged, dark-skinned, dreary, drab, blue, risky, perilous, tenacious, pertinacious, non-white, obscure, appealing

frowning (part of speech: verb)

grimacing, glaring, sulking, pouting

sullen (part of speech: adjective)

gloomy, contrary, dour, glum, fretful, sullen, scowling, cantankerous, unfriendly, sulky, frowning, ungenial, surly, obstinate, irascible, crabby, moody, uncooperative, unsociable, beetle-browed, cynical, long-faced, grim, noncooperative, moping, grouchy, hostile, cross, mean, dejected, dark, malevolent, sour, petulant, melancholy, broody, grumpy, morose, dissociable

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