keystone
key
ˈki
ki
stone
ˌstoʊn
stown
British pronunciation
/kˈiːstə‍ʊn/

英語での「keystone」の定義と意味

Keystone
01

要石, 礎石

a stone located at the top center of an arch, keeping all the other stones together
Wiki
example
The archway was supported by a central keystone, which locked the structure into place and distributed the weight evenly.
アーチウェイは中央のキーストーンによって支えられており、構造を所定の位置に固定し、重量を均等に分散しました。
02

a central element or factor that provides essential support or cohesion to a system or concept

example
Trust is the keystone of any successful relationship.
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