hardness
名词 hardness:
the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
devoid of passion or feeling; hardheartedness
同义词:unfeelingness, callousness, callosity, insensibility
the quality of being difficult to do
同义词:ruggedness
excessive sternness
同义词:severity, severeness, harshness, rigor, rigour, rigorousness, rigourousness, inclemency, stiffness