κνᾶσαι

From LSJ

ἀεί ποτ' εὖ μὲν ἀσκός εὖ δὲ θύλακος ἅνθρωπός ἐστι → this guy's always good at being a wineskin, and at times a winesack

Source

French (Bailly abrégé)

dor. c. κνῆσαι, inf. ao. de κνάω.

Russian (Dvoretsky)

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