I see this message is very old - but I was looking for help and this address came up - so I'm hoping you can help me. I clicked on this link and found out that I was right, UNTHAW is not a word. If something is UN-thawed, it is obviously NOT thawed, thawed being a state of not frozen - if something is NOT thawed, then it has to still be frozen. HOWEVER, there is a woman at a professional site on the web who is a cook and publishes recipes, believe it or not, who uses this word, UNTHAW, in a lot of her recipes. Check out -
http://busycooks.about.com/od/quickbreads/r/blueberrymuffin.html and http://busycooks.about.com/od/turkeyrecipes/r/crockpotturkey.html
I emailed her and told her about this word and she emailed me back a link to a dictionary site.
Apparently, this stupid dictionary site thinks UNTHAW is a word. What do I tell her? It's not even a matter of me being right. It's that she's using this word and misleading a lot of people - and looking rather ridiculous, as well. Thanks for your assistance.
Joanne