Codewords include Chinese and English letters, punctuation marks, symbols, pinyin, icons and words. Refers to the secret language agreed upon by each other. Example: speaking code words. Contact in code. Whispering to each other, using an agreed word to represent a special meaning. A specific word or idiom used by a specific social group, especially as a means of communication, is a prearranged code word used to convey secret information, which is a metaphor for beating around the bush when speaking.