Where does “zīment” come from?

zīment (Middle High German) comes from Old French ciment, from Latin caementum, from Latin caedō, from Proto-Italic kaidō, from Proto-Indo-European keh₂id-.

Ancestry of “zīment”, step by step

Step	Language	Word	Meaning
1	Old French	ciment	—
2	Latin	caementum	rough stone from the quarry; chips of marble;...
3	Latin	caedō	to cut, hew, fell
4	Proto-Italic	kaidō	to cut, to hew, to fell
5	Proto-Indo-European	keh₂id-	—

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