κνᾶσαι

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

French (Bailly abrégé)

dor. c. κνῆσαι, inf. ao. de κνάω.

Russian (Dvoretsky)

κνᾶσαι: дор. (= κνῆσαι) inf. aor. к κνάω.