Ilk. initial [x-] became [h-]; [x-] > [h-]
In the Comparative Tables, an initial aspirate [kʰ] developed into [h] (PE19/18). This was also true when the aspirate developed from an initial [s]: ᴹ✶sk > [kʰ >] Ilk. h (PE19/20). There are several examples of this development in The Etymologies (see below).
Phonetic Rule Elements
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Phonetic Rule Examples
| x- > h- | x- > h- | ᴹ✶khj- > Ilk. h- | ✧ PE19/18 |
| x- > h- | x- > h- | ᴹ✶kh- > Ilk. h- | ✧ PE19/18 |
| x- > h- | x- > h- | ᴹ✶skj- > Ilk. h- | ✧ PE19/20 |
| x- > h- | x- > h- | ᴹ✶sk- > Ilk. h- | ✧ PE19/20 |
| xeðw > heðw | x- > h- | ᴹ✶khithwa > Dor. heðu | ✧ Ety/KHIS |
| xest > hest | x- > h- | ᴹ√KHES > Ilk. hest | ✧ EtyAC/KHES |
| xiðm > hiðm | x- > h- | ᴹ✶khithme > Dor. hiðum | ✧ EtyAC/KHIS |