παραθαρσύνειν
From LSJ
ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us
Greek > English (Woodhouse Verbs Reversed)
(see also παραθαρσύνω): cheer, embolden, encourage
Lexicon Thucydideum
confirmare, to strengthen, 4.115.1, 5.4.6, 5.8.5, 7.2.1, 8.77.1.