deadness

(n) the quality of being unresponsive; not reacting; as a quality of people, it is marked by a failure to respond quickly or with emotion to people or events
- she began to recover from her numb unresponsiveness after the accident
- in an instant all the deadness and withdrawal were wiped away
unresponsiveness,
(n) the physical property of something that has lost its elasticity
- he objected to the deadness of the tennis balls
(n) the inanimate property of something that has died