ῥήδην
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
English (LSJ)
Adv. only in A.D.Adv.198.15, EM363.42, as part of the compd.διαρρήδην. ῥήδιος,
A v. ῥᾴδιος. ῥηδίων· καρούχων, ῥαιδίων, Hsch. ῥηθῆναι, ῥηθήσομαι, v. ἐρῶ. ῥηΐδιος, v. ῥᾴδιος. ῥηΐζω, v. ῥαΐζω. ῥήϊστος, ῥηΐτατος, ῥηΐτερος, v. ῥᾴδιος.
Greek (Liddell-Scott)
ῥήδην: Ἐπίρρ. μόνον ἐν τῷ Μεγ. Ἐτυμολ. 363. 42, ὡς συνθετικὸν μέρος τῆς συνθέτου λέξεως διαρρήδην.