S. diphthongs
original primitive diphthongs developed as follows:
| CE | OS | S | CE | OS | S | |
|---|---|---|---|---|---|---|
| ei > ē | ī | ī | iu | iu | ȳ | |
| ai, ę̄ | ai > ae | ae | eu | iu | ȳ | |
| oi | ui | ui | au, ǭ | au | au | |
| ui | ui | ui | ou > ō | ū | ū |
later diphthongs developed as follows:
| OS | S | OS | S | |
|---|---|---|---|---|
| ei | ai | iu | ȳ | |
| ai | ai | eu | ȳ? | |
| œi | ei | au | au | |
| ui? | ui | ou | au |
References ✧ LotR/1116; RGEO/63
Elements
| [ae] | ✧ LotR/1116 (ae); RGEO/63 (ae) | |
| [ai] | ✧ LotR/1116 (ai) | |
| [ei] | ✧ LotR/1116 (ei) | |
| [oe] | ✧ LotR/1116 (oe); RGEO/63 (oe) | |
| [ui] | ✧ LotR/1116 (ui); RGEO/63 (ui) | |
| [au] | “aw” | ✧ LotR/1116 (au); RGEO/63 (au) |
| [eu] |