group

n.组；类 vt.集合，配合；把…分类

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, groundsel, groundsheet, groundsman, groundwork, group captain, group practice, group therapy, groupie, grouping, grouse, grove, grovel, groveler, grovelling, grow, grow on, grow out of, grow up, grower, growing, growl, grown, grown up, grown-up,