swell /swel/ vi.(swelled /sweld/, swollen /ˈswəulən/) 1. 肿胀，膨胀：The injured wrist began to swell. 受伤的手腕开始肿起来。Her legs have swollen badly. 她的腿肿得很厉害。 2.逐渐增加：The population has swollen to over a million. 人口已增加到了100万。 3.增强，上涨：The heavy rain made the river swell. 大雨使河水上涨。