Where does “železisko” come from?

železisko (Slovak) comes from Slovak železo, from Lower Sorbian železo, from Proto-Slavic želězo — iron.

Ancestry of “železisko”, step by step

StepLanguageWordMeaning
1Slovakželezoiron
2Lower SorbianželezoObsolete form of zelezo
3Proto-Slavicželězoiron
Every word from Proto-Slavic želězo →Every word from Lower Sorbian železo →Every word from Slovak železo →
železisko — Etymology, Origin & Word History | Etymology Explorer