The verb apprehend has 3 senses (first 2 from tagged texts)
1. (2) grok, get the picture, comprehend, savvy, dig, grasp, compass, apprehend -- (get the meaning of something; "Do you comprehend the meaning of this letter?")
2. (1) collar, nail, apprehend, arrest, pick up, nab, cop -- (take into custody; "the police nabbed the suspected criminals")
3. apprehend, quail at -- (anticipate with dread or anxiety)