a serious medical condition affecting a person's foot or feet in which the top layer of skin and flesh becomes black and dies, caused by the feet being in wet conditions for a long time

Physical disorders such as trench foot can result from prolonged exposure to the cold and the damp. 长时间暴露在寒冷和潮湿的环境中会导致诸如战壕足这样的身体疾病。