Synonyms for grim
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Sullen
crabbed, sour, repellent, crusty, gloomy, intractable, sulky, morose, somber, sullen, splenetic, churlish, forbidding, glum, grumpy, scowling, grouchy, dour, glowering, dogged, stubborn, cantankerous.
Antonyms happy*, cheerful, gay.
Stern
austere, strict, harsh; see severe 1.
Relentless
unrelenting, implacable, inexorable; see severe 2, wicked 2.
See grim in Webster's New World Roget's A-Z Thesaurus II
adjective
Firmly, often unreasonably immovable in purpose or will:
adamant, adamantine, brassbound, die-hard, implacable, incompliant, inexorable, inflexible, intransigent, iron, obdurate, relentless, remorseless, rigid, stubborn, unbendable, unbending, uncompliant, uncompromising, unrelenting, unyielding. Idiom: stubborn as a mule (or ox). See resistCold and forbidding:
austere, bleak, dour, hard, harsh, severe, stark. See attitude, hotShockingly repellent:
ghastly, grisly, gruesome, hideous, horrible, horrid, lurid, macabre. See beautiful
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