DENSE

adjective (~r; ~st) Etymology: Latin densus; akin to Greek dasys thick with hair or leaves Date: 15th century 1. marked by compactness or crowding together of parts , having a high mass per unit volume , 2. slow to understand ; stupid , thickheaded , extreme , having between any two elements at least one element , demanding concentration to follow or comprehend , having high or relatively high opacity , see: stupid ~ly adverb ~ness noun