Where does “чука” come from?

чука (Serbo-Croatian) comes from Proto-Slavic čuka, from Proto-Balto-Slavic kjaukāˀ, from Proto-Indo-European kewk-éh₂, from Proto-Indo-European kewk-, from Proto-Indo-European kew- — to swell; skin, complexion; to bend, to be bent.

чука (Serbo-Croatian): hill or hillock on one side extremely steep, and...

Definitions

hill or hillock on one side extremely steep, and...

Ancestry of “чука”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	čuka	cusp, peak, rock hill
2	Proto-Balto-Slavic	kjaukāˀ	—
3	Proto-Indo-European	kewk-éh₂	—
4	Proto-Indo-European	kewk-	to elevate; height
5	Proto-Indo-European	kew-	to swell; skin, complexion; to bend, to be bent

Every word from Proto-Indo-European kew- →Every word from Proto-Indo-European kewk- →Every word from Proto-Indo-European kewk-éh₂ →