Where does “vadmacskájuk” come from?

vadmacskájuk (Hungarian) comes from Hungarian vadmacska, from Hungarian macska, from Proto-Slavic mačьka, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

Ancestry of “vadmacskájuk”, step by step

Step	Language	Word	Meaning
1	Hungarian	vadmacska	wildcat
2	Hungarian	macska	cat
3	Proto-Slavic	mačьka	cat
4	Proto-Slavic	-ьka	—
5	Proto-Balto-Slavic	-ikaʔ	—
6	Proto-Indo-European	-ikeh₂	—

Every word from Proto-Indo-European -ikeh₂ →Every word from Proto-Slavic -ьka →Every word from Proto-Slavic mačьka →