transitive. To penetrate with the sight, mind, or intellect; to see thoroughly into, discern; to understand, make sense of. Also †intransitive (obs…

transitive. To look at thoroughly, so as to perceive or understand the true nature of; to see thoroughly into; to search.

transitive. To perceive or discern the true nature of; to observe accurately or perceptively; to have or gain insight into.

transitive. To get or have insight into; to attain knowledge or understanding of; to find out, discover, discern.

intransitive. To have or gain insight into (a problem, matter, etc.); to penetrate with the mind or intellect; to understand. Now rare.

intransitive. To direct one's gaze through (an opening or gap in a solid object, a window or other transparent body, an optical instrument, etc.)…

To apprehend clearly the character or nature of (a person). Also reflexive.

transitive. To penetrate (a barrier of any kind) by breaking it; to force one's way through. Also figurative.

To get to the bottom of, dive into, penetrate, see through, thoroughly understand.

transitive. To come to understand (something mysterious, puzzling, or complicated); to solve (a mystery, etc.); to fathom.