ἀπεγγύη

From LSJ

ὁ δ' εὖ ἔρδων θεοὺς ἐλπίδι κυδροτέρᾳ σαίνει κέαρ → but he who does well to the gods cheers his heart with a more glorious hope

Source

Spanish (DGE)

-ης, ἡ garantía, Thasos 1.7 (V a.C.).