10 letters · 13 points in Scrabble
noun coldness as evidenced by frost
noun a silvery-white color
originEtymology tree English frosty Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English frostiness From frosty + -ness.
Etymology from Wiktionary, CC BY-SA 3.0