unfreeze in WordNet English dictionary

1. 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"
   dissolve  thaw  unfreeze  unthaw  dethaw  melt 
   
2. make (assets) available
   "release the holdings in the dictator's bank account"
   unblock  unfreeze  free  release