10 letters · 19 points in Scrabble
noun wisdom that is recondite and abstruse and profound
noun intellectual depth; penetrating knowledge; keen insight; etc
noun the intellectual ability to penetrate deeply into ideas
originInherited from Middle English profundite, from Middle French profondite or its etymon Latin profunditās; by surface analysis, prof(o)und + ity. Compare profoundness.
Etymology from Wiktionary, CC BY-SA 3.0