The story
- Medieval Greekεἰς (eis)
- Medieval Greekἡ (hē)
- Proto-Indo-European*tpelH-
- Proto-Hellenic*ptólis
- Medieval Greekπόλις (pólis)
- Medieval Greekεἰς τὴν Πόλιν (eis tḕn Pólin)
- Ottoman Turkishاستانبول (İstanbul)
- Turkishİstanbu
- English todayIstanbul
From Turkish İstanbul, from Ottoman Turkish استانبول (İstanbul), a corruption of Medieval Greek εἰς τὴν Πόλιν (eis tḕn Pólin, “to the City”), which is how Constantinople was referred to by the local Greeks.
Etymology from Wiktionary, CC BY-SA 4.0.