Where does “mraveniště” come from?

mraveniště (Czech) comes from Czech mravenec, from Proto-Slavic morvъ, from Proto-Balto-Slavic *marwís, from Proto-Indo-European morwís.

mraveniště (Czech): anthill

Definitions

Step	Language	Word	Meaning
1	Czech	mravenec	ant
2	Proto-Slavic	morvъ	ant
3	Proto-Balto-Slavic	*marwís	—
4	Proto-Indo-European	morwís	—

mraveniště — Etymology, Origin & Word History | Etymology Explorer