coot

n 1 type of water-bird with a white spot on the forehead 蹼鸡, 白骨顶（额上有白斑的一种水鸟）. =>illus at App 1 见附录1之插图, page v. 2 (idm 习语) bald as a coot => bald.

cool, cool-headed, coolant, cooler, coolie, cooling, cooling tower, cooling-off, coolly, coolness, coon, coop, cooper, cooperate, cooperation, cooperative, coordinate, coordination, coordinator, coorperation, cop, cop-out, copain, copartner, copartnership, cope, cope with, copeck (also kopeck), Copernican, copier, coping, coping-stone, copious, copiously, copper, copper beech, copper-bottomed, copperhead, copperplate, coppice,