Bernanke and Paulson are using everything in their toolbox to help unthaw the credit markets.
From the dallasnews.com
Loose monetary policy designed to unthaw frozen credit markets has stoked fears of inflation.
From the washingtonpost.com
The proposal might only unthaw one aspect of the Senate.
From the washingtonpost.com
When they happen upon a frozen alien, of course they leave it to unthaw while they party down in another room.
From the movies.nytimes.com
More examples
Dissolve: become or cause to become soft or liquid; "The sun melted the ice"; "the ice thawed"; "the ice cream melted"; "The heat melted the wax"; "The giant iceberg dissolved over the years during the global warming phase"; "dethaw the meat"
(unthawed) still frozen; "there wasn't time to cook the unthawed turkey, so they had to settle for hotdogs"
To not thaw; to (re-)freeze or remain frozen; To thaw out, to unfreeze; to become soft (of something which had been frozen)