dii manes

• (Classical Latin) IPA^(key): [ˈdi.iː ˈmaː.neːs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈd̪iː.i ˈmaː.nes]

diī mānēs m pl (genitive deōrum mānium or deum mānium); irregular, variously declined, second declension, third declension

1. alternative form of dī mānēs (“the gods and the spirits of the dead”)

Second-declension noun (irregular) with a third-declension noun (i-stem), plural only.