Πόλει Πόλις, Polis Morpho works with a static database. If you like, you can compare the output of Morpheus.Parsed as: Proper-name noun feminine nominative dual Proper-name noun feminine accusative dual ✓ Proper-name noun feminine dative singular of Πόλις Πόλις Feminine SingularDualPlural Nominative – – – Genitive – – – Dative Πόλει – – Accusative Πόλιν – – Vocative – – –