12 letters · 25 points in Scrabble
verb simplify to an excessive degree
verb make too simple
originEtymology tree Proto-Indo-European *úp Proto-Indo-European *-er Proto-Indo-European *upér Proto-Germanic *uber Old English ofer- Middle English over- English over- English simplify English oversimplify From over- + simplify.
Etymology from Wiktionary, CC BY-SA 3.0