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keystone
UK
/ˈkiːstəʊn/
US
/ˈkiˌstoʊn/
Phrases
The keystone of her argument was based on recent scientific research.
La pierre angulaire de son argument reposait sur desبحاث scientifiques récentes.
Trust is the keystone of any successful relationship.
La confiance est la pierre angulaire de toute relation réussie.