you together with your family and close friends你和你的一切（包括你的家人和密友）
you-know-who (或 you-know-what)
used to refer to someone (or something) known to the hearer without specifying their identity那个人（或东西）（指不待明言便知所指是谁或什么东西）
柯林斯高阶英汉双解学习词典释义
PRON
你,您,你们（可用于名词前指定谈话对象）
A speaker or writer uses you to refer to the person or people that they are talking or writing to. It is possible to use you before a noun to make it clear which group of people you are talking to.