Where does “code” come from?

code (Friulian) comes from Vulgar Latin coda, from Latin cauda, from Proto-Italic kaudā, from Proto-Indo-European keh₂udeh₂.

code (Friulian): tail; queue, line

Definitions

Step	Language	Word	Meaning
1	Vulgar Latin	coda	tail
2	Latin	cauda	A tail
3	Proto-Italic	kaudā	tail
4	Proto-Indo-European	keh₂udeh₂	—

code — Etymology, Origin & Word History | Etymology Explorer