Where does “cau” come from?

cau (Catalan) comes from Latin cavum, from Proto-Indo-European ḱówHwos — cavity.

cau (Catalan): den; burrow; lair; hiding place; sty; hovel

Definitions

Step	Language	Word	Meaning
1	Latin	cavum	a hole, cavity, depression, pit, opening; a cave,...
2	Proto-Indo-European	ḱówHwos	cavity

cau — Etymology, Origin & Word History | Etymology Explorer