That is the relationship... "contains". There are many other examples in English of that relationship in NN compounds, and I guarantee you use them unconsciously without a second thought. You are also not getting my point, please reread my last post.
> Bottom line: "ice tea" is ambiguous. "Iced tea" is not.
This is how I know you and others in this thread have not spent a lot of time thinking about language. When has ambiguity ever prevented humans from using and understanding language? If you look at any piece of writing deeply, it is filled with an unimaginable amount of nuanced ambiguity. That's exactly why NLP is so hard.