9 letters · 9 points in Scrabble
adjective impossible to satisfy
originFrom Late Middle English insaciate, insaciat, insacyate (“insatiable”), from Latin insatiātus, from in- (prefix meaning ‘not’) + satiātus (“satisfied; having been satisfied”) (perfect passive participle of satiō (“to satisfy”), from satis (“enough; filled; plenty”) (ultimately from Proto-Indo-European *seh₂- (“to satiate, satisfy”)) + -ō (suffix forming regular first-conjugation verbs)).
Etymology from Wiktionary, CC BY-SA 3.0