Greek Roots?

I need some words and definitions for the following Greek roots: aero, amphi (or ambi), and anthro. For example, one root I could find words to was astr. So, my first word is aster- a common daisy-like flower. I need four of those for each root, but just write any words you can think of, and if you can't get the definitions, I could do that part. Please, I just need some words that have aero, amphi or ambi, and anthro in them.
Greek Roots?
Since these are common prefixes, all you need to do is open the dictionary. After all, this is *your* homework -- you need to make the first good attack yourself.