ἐκτήσομαι

From LSJ

ἀγαπήσεις τὸν πλησίον σου ὡς σεαυτόν → love your neighbor as yourself, thou shalt love thy neighbour as thyself, love thy neighbour as thyself

Source

Russian (Dvoretsky)

ἐκτήσομαι: Plat. fut. 3 к κτάομαι.