Where does “كفف” come from?

كفف (Arabic) comes from Arabic ف, from Arabic نَفِدَ — to run out, to give out.

كفف (Arabic): to hem

Definitions

Step	Language	Word	Meaning
1	Arabic	ف	then, and then; and so, thus, hence, therefore;...
2	Arabic	نَفِدَ	to run out, to give out

كفف — Etymology, Origin & Word History | Etymology Explorer