Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
frosty [ˈfrɔstɪ] adj (weather, night) моро́зный*моро́зен (welcome, look) ледяно́й; (window) покры́тый/покры́т и́неем, замёрзший
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: