Where does “Kooi” come from?

Kooi (English) comes from Dutch kooi, from Middle Dutch coye, from Latin cavea, from Latin cavus, from Proto-Italic kawos, from Proto-Indo-European ḱowh₁ós, from Proto-Indo-European ḱewh₁- — to swell; to be strong.

Ancestry of “Kooi”, step by step

Step	Language	Word	Meaning
1	Dutch	kooi	cage; bunk
2	Middle Dutch	coye	—
3	Latin	cavea	hollow, cavity; cage, den, enclosure, stall,...
4	Latin	cavus	hollow, concave; excavated, channeled;...
5	Proto-Italic	kawos	—
6	Proto-Indo-European	ḱowh₁ós	hollow
7	Proto-Indo-European	ḱewh₁-	to swell; to be strong

Every word from Proto-Indo-European ḱewh₁- →