Penetration
Penetration , noun
[Latin penetratio: compare French pénétration.]
1.
The act or process of penetrating, piercing, or entering; also, the act of mentally penetrating into, or comprehending, anything difficult.
And to each in ward part,
With gentle penetration, though unseen,
Shoots invisible virtue even to the deep.
A penetration into the difficulties of algebra.
2.
Acuteness; insight; sharp discoverment; sagacity; as, a person of singular penetration. — Walpole