(1) No data available
(2) The property of being rigid and resistant to pressure
(3) Not easily scratched
(4) Measured on Mohs scale
(5) Devoid of passion or feeling
(6) The quality of being difficult to do
(7) Excessive sternness
(1) A lack of mental hardness
(2) A lack of mental hardness
(3) People complained about the hardness of the chairs
(4) People complained about the hardness of the chairs
ruggedness
inclemency
callousness
Softness