κτάσθαι
From LSJ
ἀλλήλων τὰ βάρη βαστάζετε, καὶ οὕτως ἀναπληρώσετε τὸν νόμον τοῦ Χριστοῦ → bear each other's burdens, and in that way fulfill the anointed King's Law (Galatians 6:2)
French (Bailly abrégé)
inf. ao.2 Moy. poét. de κτῆμι.
Dutch (Woordenboekgrieks.nl)
κτάσθαι poët. inf. aor. med. van κτείνω.
Russian (Dvoretsky)
κτάσθαι: inf. aor. 2 med. к *κτῆμι.