9 letters · 23 points in Scrabble
verb make formal or official
verb declare or make legally valid
originEtymology tree English formal Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō)bor. Late Latin -izōder. Middle French -iserbor. Middle English -isen English -ize English formalize From formal + -ize.
Etymology from Wiktionary, CC BY-SA 3.0