1.
foundation, basis, root, bedrock
The deepest underlying layer or foundation of something abstract, such as a belief system, culture, or way of thinking. Emphasizes what lies at the very bottom, supporting everything above it.
Common collocations
- 根底にある: to lie at the foundation of
- 根底から覆す: to overturn from the foundations
- 根底を揺るがす: to shake the very foundations
- 根底から崩れる: to collapse from the base
Usage
根底 is almost always used for abstract things — beliefs, relationships, systems, cultures. The most characteristic pattern is 根底にある (to underlie), describing what exists at the deepest level.
Similar words
根本 focuses on the fundamental origin or cause. 根底 emphasizes the deepest underlying layer that supports everything above it.