原理

Noun

 * 1) principle; tenet

Etymology
From.

Noun

 * 1) Principle.
 * 2) A fundamental truth that bases on.
 * 3) An eternal law that is common over lots of fact.
 * 4)  A basic fact which explains why something exists.
 * 5)  A basic scientific law which explains how a thing works, especially, that is quite primitive and have been found at very long ago; a principle.
 * 1)  A basic scientific law which explains how a thing works, especially, that is quite primitive and have been found at very long ago; a principle.

Usage notes

 * Law is often used as a translation word for, and effect for.