gruff

adj (of a person, his voice or behaviour) rough; surly （指人、 其声音或行为）粗野的, 粗暴的: Beneath his gruff exterior he's really very kind-hearted. 他外表粗鲁, 心地却十分善良.

grower, growing, growl, grown, grown up, grown-up, growth, groyne (US groin), grub, grubbiness, grubby, grudge, grudging, grudgingly, gruel, grueling, gruelling (US grueling), gruesome, gruesomely, gruesomeness, gruffly, gruffness, grumble, grumbler, grummet, grumpily, grumpiness, grumpy, grunt, gruyere, gryphon, GT, Guam, guano, guarantee, guarantee against, guarantor, guaranty, guard, guard against,