Where does “سياست” come from?

سياست (Classical Malay) comes from Persian سياست, from Arabic سِيَاسَة — policy, politics.

Ancestry of “سياست”, step by step

Step	Language	Word	Meaning
1	Persian	سياست	—
2	Arabic	سِيَاسَة	policy, politics

سياست — Etymology, Origin & Word History | Etymology Explorer