bedrock

Then the drill goes back into the ground to burrow two feet further, or until they reach bedrock.

Lab-based research is a bedrock of how modern science is practiced, but it cannot account for most experiences humans encounter outside the lab.

Now was the time, Sir Keir said, to "strengthen our security as the bedrock on which the economy rests – and the ultimate guarantor of everything we hold dear".

Newsom campaigned on a bedrock liberal and expensive agenda, including proposals for a state-sponsored healthcare system, universal preschool and increased funding for higher education.

That final goal is the “bedrock” of Georgia’s mental health and developmental disability system, Goico said.