Inherited from Old East Slavic ратуша (ratuša), from Polish ratusz, from Middle High German rāthūs (whence also German Rathaus); ultimately from Proto-Germanic *rēdaz + Proto-Germanic *hūsą. Polish /ʃ/ replaced Middle High German s because at the time, this letter was pronounced as apicoalveolar /s̺/ (with a weak hushing sound, similar to Castilian Spanish) and was distinct from the letter written z, pronounced as laminoalveolar /s/ (with a strong hissing sound, similar to English).
Compare parallel Russian Дом Сове́тов (Dom Sovétov, “House of Soviets”) (Дом Советов), дом сове́та (dom sovéta) from дом (dom) + сове́т (sovét).
ра́туша • (rátuša) f inan (genitive ра́туши, nominative plural ра́туши, genitive plural ра́туш, relational adjective ра́тушный)
Borrowed
Native
Borrowed
Borrowed into Proto-Slavic