11 letters · 23 points in Scrabble
adjective suffering from a form of schizophrenia characterized by foolish mannerisms and senseless laughter along with delusions and regressive behavior
originEtymology tree English hebephrenia Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ik English -ic English hebephrenic From hebephrenia + -ic.
Etymology from Wiktionary, CC BY-SA 3.0