Where does “فَاعِل” come from?

فَاعِل (Arabic) comes from Arabic خ, from Arabic ح — ب; ج.

فَاعِل (Arabic): effective; efficient

Definitions

Step	Language	Word	Meaning
1	Arabic	خ	—
2	Arabic	ح	ب; ج

فَاعِل — Etymology, Origin & Word History | Etymology Explorer