WordWeb Online

1. Not frozen
   "unfrozen ground"

1. Become or cause to become soft or liquid
   "The giant iceberg unfroze over the years during the global warming phase";
   - dissolve, thaw, unthaw [N. Amer], dethaw, melt
    
2. Make (assets) available
   "unfreeze the holdings in the dictator's bank account";
   - unblock, free, release

See also: ice-free, liquescent, liquid, liquified, melted, melting, slushy, thawed

Type of: flux, issue, liquefy, liquify, supply

Antonym: freeze, frozen