7 letters · 11 points in Scrabble
verb make or become free of frost or ice
originEtymology tree Proto-Indo-European *de Proto-Indo-European *-h₁ Proto-Indo-European *déh₁ Proto-Italic *dē Latin dē Latin dē-der. English de- Proto-Indo-European *prews- Proto-Indo-European *-tós Proto-Indo-European *prustós Proto-Germanic *frustaz Proto-West Germanic *frost Old English frost Middle English frost English frost English defrost From de- + frost.
Etymology from Wiktionary, CC BY-SA 3.0