kamień węgielny v angličtině:

cornerstone a stone representing the starting place in the construction of a monumental building. Usually it has the date carved on it

Trust is the cornerstone of their relationship.

It was during repair work at the Massachusetts State House in Boston that the time capsule was discovered hidden in the cornerstone.

Freedom of speech is the cornerstone of democracy.

In most countries, the family unit is still the cornerstone of society.

They are important cornerstones in...

this is the cornerstone of my coaching practice and what I teach is really

Make solidarity and equal rights the cornerstone of public policy.