- Word Combinations (noun)
|part of speech:
||a stone placed at the corner joining two masonry walls.
||a foundation stone laid at the onset of construction, sometimes carved with the date or hollowed to contain items of historical interest.
||something basic and indispensable; foundation.
The humanities are the cornerstone of a broad education.
- similar words:
- essential, fundamental
||backbone, base, basis, core, emphasis