penetration
Cross references: 1. discernment pen.e.tra.tion \.pen-*-'tra--sh*n\ n 1: the act or process of penetrating : as 1a: the act of entering a country so that actual establishment of influence is accomplished 1b: an attack that penetrates the enemy's front or territory 2a: the depth to which something penetrates 2b: the power to penetrate; specif : the ability to discern deeply and acutely