strengthen
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 > Greek (Woodhouse)
v. trans.
P. κρατύνειν (or mid.).
Confirm: P. βεβαιοῦν.
Encourage: P. and V. θρασύνειν, θαρσύνειν, P. ἐπιρρωννύναι; see encourage.