The caller had failed to use a recognised code word which would have verified the authenticity of the threat.打电话的人没有使用证明威胁确实存在的暗语。The intermediary gave Short a special code word and arranged a time for a contest.中间人告诉肖特一个特别的暗语，并安排了比赛的时间。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 。