Where does “забункерираност” come from?

забункерираност (Serbo-Croatian) comes from Serbo-Croatian забункери́рати, from Serbo-Croatian бункерирати, from Serbo-Croatian бу̀нкер.

Definitions

Step	Language	Word	Meaning
1	Serbo-Croatian	забункери́рати	—
2	Serbo-Croatian	бункерирати	to shut oneself in a bunker; to ban, prevent from...
3	Serbo-Croatian	бу̀нкер	—

забункерираност — Etymology, Origin & Word History | Etymology Explorer