Словари
English-Azerbaijani dictionary
keystone [ˈkiːstəʊn] noun
1 he central stone at the top of an arch that keeps all the other stones in position
az: qovuşaq daşı (tağda)
ru: замковый камень (свода или арки)
2 the most important part of a plan or argument that the other parts depend on: Changes to the welfare system are the keystone of the government’s reforms.
az: təməl daşı, bünövrə, əsas
ru: краеугольный камень, основной принцип
English-Azerbaijani dictionary