dureza betyder på engelska

arduity▼(state or quality of being arduous)
noun

hardness [hardnesses]▼(quality of being hard)
noun
[UK: ˈhɑːd.nəs] [US: ˈhɑːrd.nəs]The hardness of diamond is such that it can cut glass. = Tal es la dureza de un diamante que puede cortar vidrio.