Where does “cisac(u)la” come from?

cisac(u)la (Vulgar Latin) comes from Latin caesacula, from Latin caesaculum, from Latin caesus, from Latin caedō, from Proto-Italic kaidō, from Proto-Indo-European keh₂id-.

Ancestry of “cisac(u)la”, step by step

Step	Language	Word	Meaning
1	Latin	caesacula	—
2	Latin	caesaculum	—
3	Latin	caesus	cut, hewn, felled; struck, beaten; killed
4	Latin	caedō	to cut, hew, fell
5	Proto-Italic	kaidō	to cut, to hew, to fell
6	Proto-Indo-European	keh₂id-	—

Words derived from “cisac(u)la”

cisaille
cisailles
cisalla
scissel
cisailler
cizalla
cisaillement
cizallar
cizalladura
cizallamiento

Every word from Proto-Indo-European keh₂id- →Every word from Proto-Italic kaidō →Every word from Latin caedō →