deepness

(n) the intellectual ability to penetrate deeply into ideas astuteness, profoundness, profundity, depth,
(n) the quality of being physically deep
- the profundity of the mine was almost a mile
profoundness, profundity,
(n) the extent downward or backward or inward
- the depth of the water
- depth of a shelf
- depth of a closet
depth,
(n) a low pitch that is loud and voluminous

astuteness profoundness profundity depth

shallowness