深不可測的,難理解的,不可思議的
Fathomless \Fath"om*less\, a.
1. Incapable of being fathomed; immeasurable; that can not be
sounded.
And buckle in a waist most fathomless. --Shak.
2. Incomprehensible.
The fathomless absurdity. --Milton.