noun
fundamental principles; basics; ground rules
Refers to the most basic, underlying rules or ideas of a system, field, or activity. Often used in formal or explanatory contexts.
物理学の根本原理を理解するのは難しい。
Understanding the fundamental principles of physics is difficult.
この会社の根本原理は「顧客第一」です。
The fundamental principle of this company is 'customer first'.