G2932–κτάομαι–ktaomai

Don't take any gold, nor silver, nor brass in your money belts.

κτήσησθε ktēsēsthe “may take along”

I fast twice a week. I give tithes of all that I get.'

κτῶμαι. ktōmai “I gain.”

By your endurance you will win your lives.

κτήσασθε ktēsasthe “do you gain yourselves”

Now this man obtained a field with the reward for his wickedness, and falling headlong, his body burst open, and all his intestines gushed out.

ἐκτήσατο ektēsato “acquired”

But Peter said to him, "May your silver perish with you, because you thought you could obtain the gift of God with money!

κτᾶσθαι. ktasthai “to be obtained!”

The commanding officer answered, "I bought my citizenship for a great price." Paul said, "But I was born a Roman."

ἐκτησάμην. ektēsamēn “bought.”

that each one of you know how to possess himself of his own vessel in sanctification and honor,

κτᾶσθαι ktasthai “to control”