ἀναθαρσεῖν
From LSJ
ὣς ὁ μὲν ἔνθ' ἀπόλωλεν, ἐπεὶ πίεν ἁλμυρὸν ὕδωρ → so there he perished, when he had drunk the salt water
Greek > English (Woodhouse Verbs Reversed)
(see also: ἀναθαρσέω, ἀναθαρσῶ) regain confidence, regain courage
Lexicon Thucydideum
fiduciam recipere, to regain confidence, 5.82.2, 6.30.2, 6.49.2, 6.63.2, 6.102.1, 7.71.3.