短袜为什么叫sock

sock 英: [sɒk] 美: [sɑ:k] n.短袜; （尤指用拳头）猛击，重击; vt.重击; 给…穿袜; 例句: He pulled his sock carefully over his swollen ankle. 他小心地把短袜拉上肿胀的脚踝。 复数:socks