Firmly, often unreasonably immovable in purpose or will
Cold and forbidding
Brady and Elise exchanged a grim look.
It was a grim lot that gathered for supper that night outside the ring of firelight.
If she lived, Hilden wouldn't look as grim as he did.
His mouth was grim when he spoke.
Anne was a grim, sullen woman, frankly sensual, but as wellmeaning as ignorance and vindictiveness would allow her to be.