9 letters · 18 points in Scrabble
verb cause to be no longer approved or accepted
originEtymology tree Proto-Indo-European *de Proto-Indo-European *-h₁ Proto-Indo-European *déh₁ Proto-Italic *dē Latin dē Latin dē-der. English de- English certify English decertify From de- + certify.
Etymology from Wiktionary, CC BY-SA 3.0