King James Version
Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:English Standard Version
They are darkened in their understanding, alienated from the life of God because of the ignorance that is in them, due to their hardness of heart.New International Version
They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts.