·vi To Pass; to make way; to pierce. Also used figuratively.
II. Penetrate ·vt To enter into; to make way into the interior of; to effect an entrance into; to Pierce; as, light penetrates darkness.
III. Penetrate ·vt To affect profoundly through the senses or feelings; to touch with feeling; to make sensible; to move deeply; as, to penetrate one's heart with pity.
IV. Penetrate ·vt To pierce into by the mind; to arrive at the inner contents or meaning of, as of a mysterious or difficult subject; to Comprehend; to Understand.