carbuncle

n 1 large inflamed swelling under the skin 痈. 2 bright-red gem with a rounded shape 红玉; 红宝石.

caraway, carbide, carbine, carbohydrate, carbolic, carbolic acid, carbon, carbon black, carbon copy, carbon dating, carbon dioxide, carbon monoxide, carbon paper, carbonated, carbonic acid, carboniferous, carbonization, -isation, carbonize, -ise, Carborundum, carboy, carburettor, carcass, carcinoma, card, card index, card vote, card-carrying member, card-game, card-sharp (also card-sharper), card-table, cardamom, cardboard, cardi(o)-, cardiac, cardigan, cardinal, cardinal points, cardiologist, cardiology, care,