Where does “вентилаториште” come from?

вентилаториште (Macedonian) comes from Macedonian -иште, from Proto-Slavic -išče, from Proto-Slavic isk-je.

Ancestry of “вентилаториште”, step by step

StepLanguageWordMeaning
1Macedonian-иштеSuffix appended to words to create a neuter noun...
2Proto-Slavic-iščeDenominal, denoting places or spaces; Denominal,...
3Proto-Slavicisk-je—
Every word from Proto-Slavic isk-je →Every word from Macedonian -иште →Every word from Proto-Slavic -išče →