9 letters · 14 points in Scrabble
noun a substance that retards or stops an activity
originEtymology tree English inhibit Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor Latin -ātor Old French -eorbor. Middle English -our ▲ Latin -torlbor. English -or English inhibitor From inhibit + -or.
Etymology from Wiktionary, CC BY-SA 3.0