desanimarse
From LSJ
τὸ ἀγαθὸν αἱρετόν· τὸ δ' αἱρετὸν ἀρεστόν· τὸ δ' ἀρεστὸν ἐπαινετόν· τὸ δ' ἐπαινετὸν καλόν → what is good is chosen, what is chosen is approved, what is approved is admired, what is admired is beautiful
Spanish > Greek
ἀποκάμνω, διατρέπω, δυσθυμαίνω, δυσαναθετέω, ἀθυμέω, δυσθυμέω, ἀκηδιάω, ἐγκακέω, ἐξαθυμέω