Where does “garblement” come from?

garblement (English) comes from English garble, from Old French garbeler, from Latin garbellare, from Arabic غَرْبَلَ — to sift.

garblement (English): Garbling

Definitions

Step	Language	Word	Meaning
1	English	garble	To pick out such parts as may serve a purpose;...
2	Old French	garbeler	to garble
3	Latin	garbellare	—
4	Arabic	غَرْبَلَ	to sift

garblement — Etymology, Origin & Word History | Etymology Explorer