I don’t think this needs a special area. Here or on the composition forum would both be great places for such a discussion. The AKWN site you list is always my first visit when worrying about modern vocabulary. It might be nice to subject his list to unicodification at some point.
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sometimes, an -s- occurs at the end of the stem without any etymological reason. especially in verbal derivates.
I was looking for something completely different but sometimes you do have to love search engines’ irrelevant results. Thisone is in modern Greek but the articles in the middle are in ancient Greek. Since I am still looking for that something else I don’t have time to check it so it might not be the best but I bet you can find an idea or two in there.
Well, with the same logic, “κ??ος” also (if not mainly) means “cold” so your verb is also “inaccurate” 
What’s wrong with the original verb (mind you, we’ve actually got to make a new verb “παγώνω” but I think it has nothing to do with the original’s descriptive powers but with the way our language developed 
)
hi, for frozen rivers, a ref that came straight to mind was from near the start of Aristophanes’ Acharnians, see lines 138-140. Is that what you meant or something else? That’s from within the canon of famous texts; I assume there would be other refs in texts I have not read. cheers
This is in deed the truth.
You can check these in a lexicon:
πήγνυμι-πήγνυμαι
πηγάς (-άδος)
πῆγμα
πηγός
πηγυλίς
πηκτός-πηκτή