I.1. Accentuation
In Proto-Eleiar stress fell most probably on the initial syllable. At least, this conclusion is indicated by the initial accent of Eleiar. Prefixes, however, are never accentuated, as in Elèiar.

I.2. Sound Structure

I.2.1 Vowels
Monophtongs: short 7 e ¡ O U {
long: 7: e: i: o: u:

Diphtongs: 7¡ E¡ {¡ 7U EU {U

Vowels are written by normal letters. Long vowels are indicated by an acute (´): : á, é, í, ó, ú. The Schwa or neutral vowel is indicated by ¶ with the roots and in Eleiar or Proto-Eleiar by y; compare: ¶IN (bare, nude), *yinal (bare, nude).

I.2.2 Consonants
Plosives: p t k b d g
Fricatives: f v s z þ ð c g h
Nasals: m n
Liquids: l, r
Semi-Vowels: j w

The writing of consonants is a bit more complicated. With roots consonants are also written by capitals. The following spellings are to be noted in particular: [D] = Ð and [c] = X.
For the words of Eleiar the following spellings apply: [k] = c, [þ] = th, [ð] = dd, [c] = ch, [g] = gh, [j] = i und [z] = z.

I.3. Constraints on syllable structure
The following syllable structures are permitted in the roots of Proto-Eleiar (V = vowel, C = consonant)
V, VC, VCC
CV, CVC, CVCC
CCV, CCVC.
In the medial position of a word no more than two consonants can come into contact. If it should occur however, that more than two consonants meet morphologically in hiatus, an epenthetic vowel seperates them which is in vowel harmony with the base vowel. The following rules apply:
a, ai, au Þ a; e, ei, eu Þ e; i, i Þ i; o,u, u Þ u.

Apart from the restrictions on number there are some constraints on which consonants can come into contact as regards position. The following combinations are allowed:

a) Initial position: CC-: plosive + liquid, consonants + semi-vowel, fricative + liquid, s + consonant (with voiced consonants z- stands accordingly).
b) Medial position: -CC-: only liquids and nasals resp. nasal + consonant (exception: nasal + liquid), consonant + semi-vowel, s + consonant
c) Final position: In direct final position only one consonant can occur. Combinations of endings of two syllables of the form -VC|CV are however permitted.

II.4. Phonetic changes in the transition to Eleiar:
In the transition from Proto- to Eleiar some phonetic changes occured regularly in hiatus. These phonetic developments are found as well in the derivation of the words of Eleiar from the roots as in the further grammatical treatment of the words.
In the hiatus of vocalic syllables (that is of the structure -CV + VC-) vowels assimilate to each other (this applies to monophtongs and diphtongs both). In the process, diphtongs lose the first element (e.g. ei + a Þ ia). The following changes occur:

Long vowels assimilate the following or the preceding vowel.

Some examples show the process:
SEJ + AÐ Þ (a) siadd (people, folk); SLEI (seperate, divide)+ AÐ Þ sliadd (cleft, gap), gAI (divide, distribute) + -ON Þ ghion (distribution, f.); ÐRE (search, strive for) + -ON Þ ddreon (search, f.); ÞRE (permanent, lasting) + -AL Þ thrél (constant); GEU (foresee, suspect) + -AR Þ guar (premonition, assumption, f.).
As already mentioned, these phonetic changes apply also to other positions; e.g. kelda (happy, joyful) {Ü KEL (be happy, celebrate) + -DA} + -ON Þ keldón (happiness, joyfulness, f.).
In the hiatus of consonantal syllables (-VC + CV-) diphtongs are shortened: i, ei Þ i; u, eu Þ u; ai, au Þ a. Examples: TAUR (hurt) + -DA Þ tarda (hurtful); BEIL (begin, change) + -KA Þ bilka (changable); ÞEUR (to rage, go wild) + -DA Þ thurda (raging, furious).