friend (356 questions), friends (194 questions) and friendship (43 questions) are ambiguous. Sometimes they refer to
friend classes/functions as in C++, sometimes to social networking "friends", and sometimes to other things entirely.
Questions are often paired with facebook, facebook-graph-api or facebook-fql, implying it's referring to social networking friends, or with private, c++, c# or namespaces, implying it's referring to
friend-function and friend-class are the only tags that I see as possibilities to retag some of these as. However, I think the distinction between these tags is not useful, but I don't have an idea for a single unambiguous tag name for this concept. I have no idea on how to retag the other questions.
How should these questions be retagged?