Definition of "grimmer" []

• Comparative form of grim: more grim (adjective)

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• "The line of Daka’s mouth hardened, turning his expression grimmer still than before."
• "Judy pierced a few strands of spaghetti with her fork, her expression grimmer than anybody’s eating spaghetti should be."
• "Nettie could see his face, and she was appalled by an, expression grimmer than any she remembered; it was both harsh, implacable, and stricken, as empty of blood as the countenance on the bed."