πρόσεδρος
From LSJ
Ὁ μὲν βίος βραχύς, ἡ δὲ τέχνη μακρή, ὁ δὲ καιρὸς ὀξύς, ἡ δὲ πεῖρα σφαλερή, ἡ δὲ κρίσις χαλεπή → Life is short, art long, opportunity fleeting, experience misleading and judgment difficult
English (LSJ)
ον, (ἕδρα)
A sitting near, cj. for πρόεδρος in D.C.57.7 (sed leg. πάρεδρος): metaph., ἐκ προσέδρου λιγνύος S.Tr.794. II assiduous, Hsch.