<p><strong>Adjective</strong></p><ul><li>causing horror.</li><li>stern and admitting of no appeasement or compromise: grim determination; grim necessity.<ul><li>Synonyms: unyielding, harsh.</li><li>Antonyms: lenient.</li></ul></li><li>of a sinister or ghastly character: a grim joke.<ul><li>Synonyms: dreadful, hideous, gruesome, grisly, horrid, appalling, dire, horrible, frightful.</li><li>Antonyms: attractive.</li></ul></li><li>having a harsh, surly, forbidding, or morbid air: a grim man but a just one; a grim countenance.<ul><li>Synonyms: hard, stern, severe.</li><li>Antonyms: gentle.</li></ul></li><li>fierce, savage, or cruel: War is a grim business.<ul><li>Synonyms: ruthless, ferocious.</li></ul></li><li>unpleasant or repellant: Scrubbing toilets is a grim task that no one likes doing.</li></ul>