N. [n] assimilated to following labial at morpheme boundaries; [n+{mb}] > [m+{mb}]

N. [n] assimilated to following labial at morpheme boundaries; [n+{mb}] > [m+{mb}]

Order (02000)

Before	02100	short final vowels vanished	ON. Boronmíro/Borommíro > N. Boromir	Ety/BOR
Before	06000	[mm] shortened	ON. Boronmíro/Borommíro > N. Boromir	Ety/BOR

Phonetic Rule Elements

[n+m]	>	[m+m]
[n+b]	>	[m+b]

Phonetic Rule Examples

lenbas > lembas	n+b > m+b	ᴹ√LEN > N. lembas	✧ EtyAC/LEN
boronmiro > borommiro	n+m > m+m	ON. Boronmíro/Borommíro > N. Boromir	✧ Ety/BOR