a person that you trust and who you talk to about private or secret things (可吐露秘密的)知己,密友 a close/trusted confidant of the president 总统的密友/亲信 There were times when a semi-stranger was a better confidante than a close friend. 有时候,一个半陌生的人比一个亲密的朋友更能成为知己。
Word Originmid 17th cent.: alteration of confident (as a noun in the same sense in the early 17th cent.), probably to represent the pronunciation of French confidente ‘having full trust’.