Incommunicable
...they are distinguished into communicable and incommunicable, but we know that this is to be understood not formally (in which sense all are equally incommunicable), but only analogically.
Francis Turretin, Institutes of Elenctic Theology, ed. James T. Dennison Jr., trans. George Musgrave Giger, vol. 2 (Phillipsburg, NJ: P&R Publishing, 1992-1997), 325.