1.gain an insight into sb.'s mind;
2.Nobody saw through Mary’s deceptions.
3.of meaning; not capable of being penetrated.
4.Keen eyes that penetrate the darkness.
5.(of meaning) capable of being penetrated or comprehended.
6.One never gets below the surface with him
7.We all saw through him, ie realized what type of man he really was.
8.They immediately saw through what he had in mind.
9.This enabled us to see through their plots.
10.Mothers know whern u r faking.