[pә:dʒ]； 看着是从pure 演化过来的，就是使纯洁。清除污秽的含义。 n. 净化, 清除, 泻药 vt. (使)净化, 清除, (使)通便 vi. (使)净化, 清除, (使)通便 【计】 服务器文件删除实用程序 【医】 催泻, 泻剂 /pɜːdʒ; pɝdʒ/ v 1 [Tn, Tn.pr, Tn.p] ~ sb (of/from sth); ~ sth (away) make sb clean or pure by removing (evil, sin, etc) 为某人（免罪、赦罪等）: Catholics go to confession to be purged of sin/purge (away) their sin/purge their souls of sin. 天主教徒透过告解以获得赦罪[净化灵魂]. 2 [Tn] (dated or joc 旧或谑) empty the bowels (of a person) 给（某人）通便: A dose of this stuff will purge you! 这种药只须一剂就能让你通便! 3 [Tn, Tn.pr] ~ sth (of sb)/~ sb (from sth) rid (esp a political party) of (people thought to be undesirable); remove (such people) from (a party) 清除（尤指政党的）（异己分子）; 清洗（党员）: So-called traitors were purged (from their ranks). 所谓的叛徒均已（从队伍中）清洗出去. * They promised that the party would be purged of racists/that racists would be purged from the party. 他们保证该党一定把种族主义分子清除掉[把种族主义分子从党内清洗出去]. 4 [Tn] (law 律) atone for (an offence, esp contempt of court) 弥补（罪过, 尤指藐视法庭罪）: purge one’s contempt 于藐视法庭後认错以求得免罪.

n 1 action of ridding (a political party, state, etc) of people who are considered undesirable （政党、国家等之）清洗行动; 整肃: a purge of disloyal members 对不忠诚分子的整肃行动 * the political purges that followed the change of government 随政权之改变而来的政治上的清洗. 2 (esp formerly) medicine that empties the bowels; purgative （尤指旧时的）泻药, 泻剂.

而clean就是简单的清理，不带有什么色彩，而purge看似有些色彩在里面。

void tcp_write_queue_purge(struct sock *sk) { 比如这个函数名称，就是将tcp的写队列，清理一下。