As no other word beginning in ph- is attested, it is assumed that a nasal mutation is triggered by the pronoun în.1 , hence the form observed in the "King's Letter"
Sindarin
ilu
noun. universe, the whole, cosmos
pân
adjective. all, in totality
pân
noun/adjective. all, all, *complete, entire, full, the whole
A word for “all” appearing only in its mutated plural form phain in the King’s Letter from the phrase ar e aníra ennas suilannad mhellyn în phain “and he desires to greet there all his friends” (SD/129). It is almost certainly based on the root √KWA “complete, full”.
Neo-Sindarin: In a conversation on Vinyë Lambengolmor Discord Server (VLDS) from 2022-03-10 involving Arael, Raccoon, Lokyt, and Röandil it was suggested that pân might also mean “✱complete, entire, full, the whole”. For purposes of Neo-Sindarin, I would use this word as both an adjective and a (pro)noun as in anno annin bân “give me [it] all”. As an adjective it would usually be in the plural: edhil bain “all elves” or i edhil bain “all [of] the elves”, except perhaps when modifying a mass noun: nen bân “all water” or i nen bân “all [of] the water”.
Also recall that Sindarin has a system of class plurals which are used to designate an entire class or all of a group in a given context, such as edhelrim meaning either “all of elvenkind” or “all the elves in this context”. Thus I would only use pân with an ordinary plural when it is necessary to emphasize the completeness or wholeness of the group in question. When used with a class plural I would give pân the sense “entire” or “the whole”. Compare Aran Edhelrim “King of Elvenkind” vs Aran Edhelrim Bân “King of the Whole of Elvenkind” (no elf excluded).
illad
noun. everything
ilnad
pronoun. everything
A neologism for “everything” coined by Fiona Jallings as a combination il “all” and [N.] nad “thing”. Elaran instead proposed ᴺS. illad based on the sound change whereby ancient ln became ll. I prefer Fiona’s neologism, since I think the sound change of ln to ll is ancient enough that it is no longer active in modern Sindarin and thus ln is possible as a combination in later compounds. However, there are no attested examples of ln in Sindarin or Noldorin of the 1950s and 60s, so illad is probably more popularly among Neo-Sindarin writers.
menel
heaven
(i venel), pl. menil (i menil)
pân
all
(adj.) *pân, pl. pain (only attested in mutated pl. form phain, SD:128-31). Not to be confused with the noun pân ”plank”.
pân
all
pl. pain (only attested in mutated pl. form phain, SD:128-31). Not to be confused with the noun pân ”plank”.
A neologism coined by Paul Strack in 2021 specifically for Eldamo, the Sindarin equivalent of Q. ilu and Q. ilúvë as terms for the entire universe.