From a compound of pros and the base of hedraios; to sit near, i.e. Attend as a servant -- wait at.
see GREEK pros
see GREEK hedraios
1. properly, to sit near ((Euripides, others)).
2. to attend assiduously: τῷ θυσιαστηρίῳ (see παρεδρεύω), 1 Corinthians 9:13 Rec.; Protevangelium Jacobi, 23, 1 (where we also find the variant παρεδρεύω); τῇ θεραπεία τοῦ Θεοῦ, Josephus, contra Apion 1, 7, 1; ταῖς φιλοπονιαις, Aristotle, pol. 8, 4, 4, p. 1338b, 25; τοῖς πραγμασι, Demosthenes, pp. 14,15 (i. e. Olynth. 1, 18); with the dative of person to be in attendance upon, not to quit one's side, Josephus, contra Apion 1, 9, 1; (cf. Demosthenes, 914, 28).