Where does “cause” come from?

cause (Norman) comes from Old French cause, from Latin causa, from Old Latin caussa, from Proto-Indo-European kawd-teh₂.

cause (Norman): case

Definitions

Step	Language	Word	Meaning
1	Old French	cause	cause
2	Latin	causa	cause, reason; case, claim, contention; motive,...
3	Old Latin	caussa	cause, reason, purpose; case, claim; Archaic form...
4	Proto-Indo-European	kawd-teh₂	—