code word

英 [ˈkəʊd wɜːd]

美 [ˈkoʊd wɜːrd]

n. 代码字; 码字

柯林斯词典

N-COUNT (事先约定的)代号，暗号
Acode wordis a word or phrase that has a special meaning, different from its normal meaning, for the people who have agreed to use it in this way.
1. ...magnum, the code word for launching a radar attack.
  发起雷达攻击的暗号“大酒瓶”
N-COUNT (尤指公众人物为避免某个词汇而使用的)代名词
Acode wordis a word or phrase that someone, especially a public figure, uses in order to avoid saying something else.
1. I think nationalism is just a code word for racism...
  我认为民族主义不过是种族主义的代名词。
2. 'Tired and emotional' is a code word for being drunk.
  “又累又激动”是形容人喝醉酒的一种委婉说法。