kőkemény означает в английский

stony [stonier, stoniest]▼◼◼◼adjective
[UK: ˈstəʊ.ni] [US: ˈstoʊ.ni]

as hard as a stone▼◼◻◻adjective
[UK: əz hɑːd əz ə stəʊn] [US: ˈæz ˈhɑːrd ˈæz ə ˈstoʊn]

bony [bonier, boniest]▼adjective
[UK: ˈbəʊ.ni] [US: ˈboʊ.ni]

stonehard▼adjective
[UK: stˈəʊnhɑːd] [US: stˈoʊnhɑːrd]