θρασύνειν
From LSJ
Κακὸν φέρουσι καρπὸν οἱ κακοὶ φίλοι → Evil friends bear evil fruit → Malo ex amico fructus oritur pessimus → Ertrag, den schlechte Freunde bringen, der ist schlecht
Greek > English (Woodhouse Verbs Reversed)
cheer, embolden, encourage, nerve, assert oneself, be bold, raise spirits of (see also: θρασύνω)
Lexicon Thucydideum
confirmare, to strengthen, 1.142.8,
PASS. insolescere, to become insolent, 5.104.1.