Hi Mike,
Yes, the word misei means hate. It is found in Luke 14,26. Read the whole verse, and you will understand that the meaning is : when you commit to Jesus, the commitment must be absolute : no holding back. You will recall other passages with similar meaning e.g. Luke 9,59ff : "Let the dead bury the dead " and “Whoever lays his hand to the blow and looks back is unfit for the Kingdom of God”.
Verbum