(bound form) polite prefix used before certain verbs to show respect to the other person, as in 拜访 bài​fǎng, 拜托 bài​tuō, or 拜读 bài​dú

to reply; to answer

to pay one's respects or do obeisance, such as by bowing, kneeling, or joining hands; to worship a deity or ancestors

to return; to go back; to reverse; to turn over