Reconstruction talk:Proto-Germanic/durz

dative, instrumental plural
Hi. Can you tell me, please, where the *-u- comes from in the declension *duru̲maz and *duru̲miz? From the thematic stems? D.Ringe (2006: 274) writes only -maz and -miz. Gnosandes (talk) 15:28, 23 July 2021 (UTC)