* Prinsipyo: This is the most common and direct translation of "principle." It refers to a fundamental truth or belief that serves as a guiding rule for behavior or conduct.
* Alituntunin: This word is closer to "rule" or "guideline" but can also encompass the broader meaning of "principle." It emphasizes the practical application of principles in a particular situation.
* Batayan: This means "foundation" or "basis" and can be used to refer to the underlying principle upon which something is built.
* Pangunahing simulain: This literally translates to "main principle" and emphasizes the importance and centrality of a particular principle.
The best Tagalog word to use depends on the specific context and meaning you want to convey.