I decided to pop over to the OEDILF, where I haven't been for a while now, and write a couple of limericks for them. In the word list I found "dethaw" which is listed in about half a dozen One-look sources as an informal synonym for "thaw". Shouldn't it mean "freeze"?
"No man but a blockhead ever wrote except for money." Samuel Johnson.
I suspect that unconsciously people associated de- with undoing something and see "freezing" as something being done and "thawing" as something being undone so that de- must be associated with the negative act. Hence dethaw must be the same as unfreeze, even though they should be logical opposites.
"No man but a blockhead ever wrote except for money." Samuel Johnson.