keystone
US /ˈkiː.stoʊn/
UK /ˈkiː.stoʊn/
1.
chave, pedra angular
a central stone at the summit of an arch, locking the whole together
:
•
The architect carefully placed the keystone to complete the arch.
O arquiteto colocou cuidadosamente a chave para completar o arco.
•
Without the keystone, the entire structure would collapse.
Sem a chave, toda a estrutura desabaria.
2.
pedra angular, pilar central
the central principle or part of a policy, system, etc., on which all others depend
:
•
Education is the keystone of a prosperous society.
A educação é a pedra angular de uma sociedade próspera.
•
The new policy is the keystone of their economic reform.
A nova política é a pedra angular de sua reforma econômica.