bedrock
UK: ˈbɛdrɒk | US: ˈbɛdrɑːk
n. 1. The solid rock underlying loose deposits such as soil or alluvium.
n. 2. The fundamental principles or foundation of something.
The word "bedrock" combines "bed," derived from Old English bedd (meaning a resting place or base layer), and "rock," from Old English rocc (meaning stone or mass of mineral matter). The term emerged in the early 19th century, originally describing the solid rock beneath surface soil. Over time, it metaphorically expanded to signify the unshakable foundation of ideas or systems, reflecting its geological stability.
The geologists drilled through the soil to reach the bedrock.
Trust is the bedrock of any strong relationship.
The house’s foundation was anchored firmly in the bedrock.
His theories became the bedrock of modern physics.
Without bedrock support, the entire project would collapse.