penetration

[1]	piercing , incursion , perforation , puncturing , incision , puncture , penetrating , inroad , entry , entrance
[2]	insight , insight , keenness , perception , percipience , intelligence , perspicacity , perspicuity , perspicaciousness , perceptiveness , acuteness , incisiveness , sensitivity , sentience , understanding , acuteness , discernment , discrimination , cleverness , shrewdness , wit , quick-wittedness