grit

n.砂粒；勇气，毅力 v.咬紧牙关

grim-faced, grimace, grime, grimly, grimness, grimy, grin, grind, grinder, grinding, grindstone, grip, gripe, gripe-water, gripping, grippingly, grisly, grist, gristle, gristly, grits, grittiness, gritty, grizzle, grizzled, grizzly, Gro, groan, groats, grocer, groceries, grocery, grog, groggily, grogginess, groggy, groin, grommet, groom, groove,