Probably from the base of ginosko; the intellect, i.e. Mind (divine or human; in thought, feeling, or will); by implication, meaning -- mind, understanding. Compare psuche.
KJV: And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
NASB: And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper,
KJV: But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.
NASB: but I see a different law in the members of my body, waging war against the law of my mind and making me a prisoner of the law of sin which is in my members.
KJV: I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
NASB: Thanks be to God through Jesus Christ our Lord! So then, on the one hand I myself with my mind am serving the law of God, but on the other, with my flesh the law of sin.