Grim, a. [Compar. Grimmer (-mer); superl. Grimmest (.]
Etymology: [AS. grim; akin to G. grimm, equiv. to G. & D. grimmig, Dan. grim, grum, Sw. grym, Icel. grimmr, G. gram grief, as adj., hostile; cf. Gr.
Of forbidding or fear-inspiring aspect; fierce; stern; surly; cruel; frightful; horrible. Whose grim aspect sets every joint a-shaking. Shak . The ridges of grim war. Milton.
Syn.-- Fierce; ferocious; furious; horrid; horrible; frightful; ghastly; grisly; hideous; stern; sullen; sour.