apprehend

(verb) get the meaning of something. Synonyms: grok, get the picture, comprehend, savvy, dig, grasp, compass. Examples: "Do you comprehend the meaning of this letter?."

(verb) take into custody. Synonyms: collar, nail, arrest, pick up, nab, cop. Examples: "The police nabbed the suspected criminals."

(verb) anticipate with dread or anxiety. Synonyms: quail at.