apprehend

/ˌæprɪˈhɛnd/
verb
  1. To arrest or capture someone, especially by police.
    • Security guards apprehended the shoplifter as he tried to leave the store.
    • The police apprehended the suspect near the train station.
    • The fugitive was apprehended after a two-week manhunt.
  2. To understand or grasp the meaning of something.
    • She quickly apprehended the main points of the lecture.
    • He could not apprehend why she was so upset.
    • It took a while for the students to apprehend the complex theory.