In a recent submission, one of the writers used the word “dethaw” in a story. A couple of us questioned this word. I, for one, have never heard it or seen it in print.
Web research shows that it may be a word. The meaning of dethaw is that something becomes or is caused to become soft or liquid.
The website Yahoo Answers had a long explanation of the term dethaw some years ago. In part, here is what johndiva said in his answer on the website.
THAW and DEFROST are cognates — the first one comes from Germanic and the second word from Latin. Therefore, you can use them interchangeably as synonyms.