Q. [n] vanished between vowels and [r] with compensatory lengthening; [Vnr] > [V̄ør]

Reference ✧ PE17/162 ✧ for example: māra < ✶manrā, †marna “good”

Phonetic Rule Elements

[Vnr] > [V̄ør] ✧ PE17/162.3602 (nr > ¯r)