Dan. initial [x] became [h], unvoicing following [l], [r], [w]; [x-|x{lrw}-] > [h-|ø{l̥r̥w̥}-]
According to the Comparative Tables, the initial voiceless velar spirant [x] that developed from [kʰ] became [h] (PE19/18, 21). There was a similar change in Noldorin and Ilkorin, as well as in the Germanic languages languages that inspirited Danian (ref/@@@). Where the initial [x] was followed by a [l], [r] or [w], it seems to have unvoiced that consonant, similar to the changes in Ilkorin.
Phonetic Rule Elements
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Phonetic Rule Examples
| x- > h- | x- > h- | ᴹ✶khj- > Dan. h- | ✧ PE19/18 | 
| x- > h- | x- > h- | ᴹ✶khj- > ED. h- | ✧ PE19/18 | 
| x- > h- | x- > h- | ᴹ✶kh- > Dan. h- | ✧ PE19/18 | 
| x- > h- | x- > h- | ᴹ✶kh- > ED. h- | ✧ PE19/18 | 
| xl- > l̥- | xl- > l̥- | ᴹ✶khl- > Dan. hl- | ✧ PE19/21 | 
| xl- > l̥- | xl- > l̥- | ᴹ✶khl- > ED. hl- | ✧ PE19/21 | 
| xr- > r̥- | xr- > r̥- | ᴹ✶khr- > Dan. hr- | ✧ PE19/21 | 
| xr- > r̥- | xr- > r̥- | ᴹ✶khr- > ED. hr- | ✧ PE19/21 | 
| xrassa > r̥assa | xr- > r̥- | ᴹ✶khrassē > Dan. hrassa | ✧ Ety/KHARÁS | 
| xw- > w̥- | xw- > w̥- | ᴹ✶khw- > Dan. hw- | ✧ PE19/18 | 
| xw- > w̥- | xw- > w̥- | ᴹ✶khw- > ED. hw- | ✧ PE19/18 |