Question

noun1 a fundamental truth or proposition that serves as the foundation for a system of belief or behaviour or for a chain of reasoning: 2 a general scientific theorem or law that has numerous special applications across a wide field.3 a fundamental source or basis of something:

Accepted Answer

principle

Front	noun 1 a fundamental truth or proposition that serves as the foundation for a system of belief or behaviour or for a chain of reasoning: 2 a general scientific theorem or law that has numerous special applications across a wide field. 3 a fundamental source or basis of something:
Back	principle

Fundamental Noun Truth Proposition Serves Foundation System Belief