G(rimness)

grim adjective
\ ˈgrim \
grimmer; grimmest
Definition of grim
1 : fierce in disposition or action : SAVAGE
grim wolves
2a : stern or forbidding in action or appearance
a grim taskmaster
b : SOMBER, GLOOMY
grim news of the disaster
3 : ghastly, repellent, or sinister in character
a grim tale
4 : UNFLINCHING, UNYIELDING
grim determination