keystone
Translation
keystone, cornerstone, central principle
Examples
The keystone at the top holds the arch together.
The keystone at the top holds the arch together.
Trust is the keystone of a strong relationship.
Trust is the keystone of a strong relationship.
Grammar Patterns
the ((keystone)) ((of sth.)) the most important part of sth. This principle is the keystone of their philosophy.
Similar Words
Synonyms: cornerstone, foundation, linchpin, centerpiece
Etymology
Composed of 'key' + 'stone'. It refers to the stone that is the 'key' to holding an arch together.
Memory Tips
Picture a key-shaped stone at the top of an arch, holding the entire structure in place. This applies to ideas too.