เทียว

v. to retrace one's steps repeatedly, to walk back and forth stopping to examine articles or to make a purchase (as is done at a fair to bazaar);

adv. surely, immediately, at once (indicating the imperative mood).

คุณแน่ใจเทียวหรือ Are you quite (absolutely) sure? เขาเดินเทียวไปเทียวมาอยู่หน้าโรงหนัง He walked to and fro in front of the movie house (movie theatre, cinema).