is a specific kind of: understand.

is a broader term that covers: figure | catch on, cotton on, get it, get onto, get wise, latch on, tumble, twig | intuit | digest.

derivation: apprehension, discernment, savvy, understanding | comprehension | appreciation, grasp, hold | grasping | apprehender, knower | comprehendible, comprehensible | apprehensible, graspable, intelligible, perceivable, understandable | apprehensive, discerning.