The Immaculate Conception in Luke One 20

This is a question for steve. How do you understand luke one 20 eighth title for mary, full of grace? In the greek, literally meaning something like having been made completely full in regard to the immaculate conception. I addressed this a little bit during the debate o the specific greek word cartomany,. which is translated full of grace, or highly favored. Even jimmy akin, from catholic answers it.