Dan. [z] became [r]; [z] > [r]
Reference ✧ PE19/28
Phonetic Rule Elements
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                   | 
               > | 
                   | 
               ✧ PE19/28 (z > r) | 
Phonetic Rule Examples
| beznō > bernō | z > r | ᴹ✶besnō > Dan. beorn | ✧ Ety/BES | 
| ezdē > erdē | z > r | ᴹ✶EZDĒ > Dan. Eord | ✧ EtyAC/EZDĒ | 
| mizdē > mirdē | z > r | ᴹ✶mizdē > Dan. meord | ✧ Ety/MIZD |