swing v. 摇摆；n. 秋千
↓
词根：sw/swa 摇摆
↓
sway v. 摇晃；说服，使动摇
↓
例：The branches were swaying in the wind. 树枝在风中摇曳。（牛津词典）
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swing → sway
swing v. 摇摆；n. 秋千
↓
词根：sw/swa 摇摆
↓
sway v. 摇晃；说服，使动摇
↓
例：The branches were swaying in the wind. 树枝在风中摇曳。（牛津词典）