Usage patterns
〈事〉の根底にあるto underlie something; to be at the root of something
That way of thinking is at the root of his philosophy.
〈事〉を根底から覆すto overturn something at its very foundation
That discovery overturned the conventional theory from its foundations.
〈事〉の根底を揺るがすto shake the very foundation of something
The scandal shook the very foundation of trust in the company.
〈事〉の根底には〈事〉があるthere is X underlying Y
A strong sense of justice underlies his actions.
