gruelling (US grueling)

adj severe; exhausting 严厉的; 使人筋疲力竭的: a gruelling climb, race, trial, ordeal, etc 使人筋疲力竭的攀登、 竞赛、 审讯、 考验等.

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