swell¹/swɛl; swel/ v swelled, swollen /`swolən; ˈswəʊlən/ , swelling 1 [I] also 又作 swell up to increase in size 膨胀; 肿胀: My ankle swelled up like a balloon. 我的脚踝肿得像个气球。 2 [I,T] to increase to a much bigger amount or number 增多，增大: The city's population has swollen to 2 million. 该市的人口已经增加到二百万了。