Eldamo : Noldorin : medial [s] became [θ] before [l], [r]

N. medial [s] became [θ] before [l], [r]; [Vs{lr}] > [Vθ{lr}]

GS/§4.144, note: Cílu @@@

Order (04900)

After	03800	nasals vanished before spirantal clusters	ᴹ✶la(n)sro-ndo > N. lhathron	Ety/LAS²
After	04800	middle consonants frequently vanished in clusters	ᴹ√LOD > othlond > N. othlon ᴹ√LUS > N. lothren	Ety/LOD EtyAC/LUS
Before	05600	[mb], [nd] became [mm], [nn]	ᴹ√LOD > othlond > N. othlon	Ety/LOD

medial [s] became [θ] before [l], [r] as ON. initial [s] became [θ] before [l], [r]
ON. medial [s] assimilated to following nasal or liquid but later medial [s] became [θ] before [l], [r]

Phonetic Rule Elements

[Vsl]	>	[Vθl]
[Vsr]	>	[Vθr]

Phonetic Rule Examples

HSG/§2.4

Order (05800)

Before

05900

ON. initial [s] became [θ] before [l], [r] as [s] became [θ] before [l], [r], [w]

Phonetic Rule Elements

Phonetic Rule Examples