Where did the word "friend" come from?

The word friend has long existed in our Chinese. However, the "friends" mentioned by the ancients are not the same as those we say now. The word "friend" we are talking about now is a concept, which refers to people who have friendship with each other and are friendly to each other. In the era of the Book of Changes and The Analects of Confucius, general nouns were rarely expressed in two words. The word "friend" is two concepts. According to the ancients' explanation, "classmates call friends, comrades call friends" and "classmates" are people who study under the same teacher, so "friends" are what we call classmates now; The so-called "comrade" is of course not the "revolutionary comrade" we are talking about now, but refers to people with similar interests who can get along well, so this "friend" is our concept of "friend" now. In other words, the "friends" mentioned in the Book of Changes and the Analects of Confucius are equivalent to the two meanings of "classmates and friends" that we now say. Now we call the "friend" mentioned by the ancients "friend" and add the word "friend". Is it redundant? No. It is necessary to add the word "friend". It makes the concept of friends more clear. If the word "friend" expresses the connotation of the concept of "friend", then the word "friend" that we have added before the word "friend" further restricts and clarifies the extension of the word "friend". Now what we call "friend" is similar to what the ancients called "friend", but the expression is more accurate, which is a progress in language. The word friend, if the word "friend" refers to what is a friend, then the word "friend" is telling us under what circumstances people can become friends. Or under what circumstances people are not easy to become friends. Among the external factors of becoming friends, the most important thing is status. It is difficult for people with different status to become friends. The most typical example is "taoyuan sworn" in the romance of the three kingdoms. At the beginning, Liu, Guan and Zhang had the same status, so the relationship between them at that time was a friend, not a friendship. Later, when the status changed, the relationship changed. The "righteousness" between them was the "friendship" between friends in the early days, and later, it became a duty to the cause, society and country. Guan Yunchang was familiar with the Spring and Autumn Annals, and understood the etiquette, so he was able to change his role consciously. Zhang yi Du was reckless and didn't understand this, so he was often in a bad mood. Even in the hail of bullets, the relationship between life and death is different because of different status. "Close comrades-in-arms" is not something that everyone can yell at. Officers are to soldiers, and superiors are to subordinates. They can only be "old officers" and "old superiors". On the other hand, the iron relationship is also an "old subordinate." Don't think this is a simple truth. In fact, many big people don't understand this, such as Lin Biao. People with high status should not be too close to people with low status. If they share feelings like friends, it is not "friendship" but "love". This is a big taboo, and committing a big taboo will ruin great things. In the Tang and Ming Dynasties, it was "favourites" and "favourites" that led to the Anshi Rebellion. Therefore, people with high status have few friends, which is called "it is too cold at the top", while life without friends and friendship is lonely, painful and therefore unfortunate. People with low status should not try to make friends with people with high status. This is called "flattery" or "flattery", which will arouse the suspicion of the other party and lead to jealousy, and the consequences are often very dangerous. If you don't see a law, you will come; It can be called viewing the Tathagata as comfortable as seeing the Tathagata; Self-observation and self-observation