10 letters · 14 points in Scrabble
adjective restricting according to rules or principles
originEtymology tree English regulate Proto-Indo-European *-wós Proto-Indo-European *-iHwósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English regulative From regulate + -ive.
Etymology from Wiktionary, CC BY-SA 3.0