space that is surrounded by something
a sizeable hole (usually in the ground)
soft decayed area in a tooth; progressive decay can lead to the death of a tooth
(anatomy) a natural hollow or sinus within the body
the extent downward or backward or inward
the intellectual ability to penetrate deeply into ideas
degree of psychological or intellectual profundity
the attribute or quality of being deep, strong, or intense
(usually plural) a low moral state
