ap·pre·hend (pr-hnd)
v. ap·pre·hend·ed, ap·pre·hend·ing, ap·pre·hends
v.tr.
1. To take into custody; arrest: apprehended the murderer.
2. To grasp mentally; understand: a candidate who apprehends the significance of geopolitical issues.
3. To become conscious of, as through the emotions or senses; perceive.
v.intr.
To understand something.