grotto

n.洞穴, 岩穴, 人工洞室

grocery, grog, groggily, grogginess, groggy, groin, grommet, groom, groove, grooved, groovy, grope, gropingly, gross, gross national product, grossly, grossness, grotesque, grotesquely, grotesqueness, grotty, grouch, grouchy, ground, ground control, ground crew, ground floor, ground rule, ground speed, ground staff, ground swell, ground-bait, ground-nut, ground-plan, ground-rent, grounded, grounding, groundless, groundlessly, grounds,