ON. labialized velars became labials; [kw|kʰw-|gw|ŋgw] > [p|pʰ-|b|mb]
References ✧ PE19/32, 35; PE22/25
Phonetic Rule Elements
|  | > |  | ✧ PE19/18 (kw- > p-); PE19/20 (skw- > sph-); PE19/23 (-kw- > -p-) | 
|  | > |  | ✧ PE19/18 (khw- > ph/f-) | 
|  | > |  | ✧ PE19/18 (gw- > b-); PE19/23 (-gw- > -b-) | 
|  | > |  | ✧ Ety/ING (ngw > mb); PE19/20 (ŋgw- > mb-) | 
|  | > |  | |
|  | > |  | 
Phonetic Rule Examples
| gwenja > benja | gw > b | ᴹ√GWEN > N. bein | ✧ Ety/GWEN | 
| gwinde > binde | gw > b | ᴹ√GWINDI > bind > N. binn | ✧ EtyAC/GWINDI | 
| gwinje > binje | gw > b | ᴹ√GWIN > N. bîn | ✧ EtyAC/GWIN | 
| alkwā > alpā | kw > p | ᴹ✶alk-wā > ON. alpha | ✧ Ety/ÁLAK | 
| atakwē > atapē | kw > p | ᴹ✶atakwē > N. adab | ✧ Ety/TAK | 
| atakwī > atapī | kw > p | ᴹ✶atakwē > N. edeb | ✧ Ety/TAK | 
| djelekwa > djelepa | kw > p | ᴹ√DYEL > N. deleb | ✧ Ety/DYEL | 
| erekwa > erepa | kw > p | ᴹ✶ereqa > N. ereb | ✧ Ety/ERE | 
| laikwa > laipa | kw > p | ᴹ✶laı̯k-wā > N. lhoeb | ✧ Ety/LÁYAK | 
| laikwa > laipa | kw > p | ᴹ✶laı̯k-wā > N. lhaeb | ✧ EtyAC/LÁYAK | 
| lassekwelēnē > lassepelēnē | kw > p | ᴹ✶lassekwelēnē > N. lhasbelin | ✧ EtyAC/KWEL | 
| kwalme > palme | kw > p | ᴹ√KWAL > N. palw | ✧ EtyAC/KWAL | 
| kwāme > pāme | kw > p | ᴹ√KWAM > N. paw | ✧ Ety/KWAM | 
| kwanta- > panta- | kw > p | ᴹ√KWAT > N. pannod | ✧ Ety/KWAT | 
| kwanta > panta | kw > p | ᴹ√KWAT > ON. panta | ✧ Ety/KWAT | 
| kwantjēnare > pantjēnare | kw > p | ᴹ√KWAT > N. penninar | ✧ Ety/YEN | 
| kwantra- > pantra- | kw > p | ᴹ√KWAT > N. pathro | ✧ Ety/KWAT | 
| kwāre > pāre | kw > p | ᴹ√KWAR > ON. pōre | ✧ Ety/KWAR | 
| kwelēnē > pelēnē | kw > p | ᴹ✶kwelēnē > N. belin | ✧ Ety/LAS¹ | 
| kwǣnē > pǣnē | kw > p | ᴹ✶kwǣ-nē > ON. †paine | ✧ EtyAC/KWǢ | 
| kwenedē > penedē | kw > p | ᴹ✶kwenedē > N. penedh | ✧ Ety/KWEN(ED) | 
| kwenedī > penedī | kw > p | ᴹ✶kwenedē > N. penidh | ✧ Ety/KWEN(ED) | 
| kwentā > pentā | kw > p | ᴹ✶kwentā > N. pent | ✧ Ety/KWET | 
| kwentasse > pentasse | kw > p | ᴹ√KWET > N. pennas | ✧ Ety/KWET | 
| kwentrō > pentrō | kw > p | ᴹ✶kwentrō > N. pethron | ✧ Ety/KWET | 
| kwesseke > pesseke | kw > p | ᴹ√KWES > N. pesseg | ✧ Ety/KWES | 
| kwetta > petta | kw > p | ᴹ✶kwetta > N. peth | ✧ Ety/KWET | 
| kwiŋgā > piŋgā | kw > p | ᴹ✶kwingā > N. peng | ✧ Ety/KWIG | 
| salakwē > salapē | kw > p | ᴹ✶SALÁK-(WĒ) > ON. salape | ✧ Ety/SALÁK | 
| uskwē > uspē | kw > p | ᴹ✶us(u)k-wē > N. osp | ✧ Ety/USUK | 
| aŋgwa > amba | ŋgw > mb | ᴹ√ANGWA > N. am- | ✧ Ety/ANGWA | 
| geŋgwā > gembā | ŋgw > mb | ᴹ√GENG-WĀ > gemb > N. gem | ✧ Ety/GENG-WĀ | 
| iŋgwege > imbege | ŋgw > mb | ᴹ✶ingwege > N. †Imbe | ✧ EtyAC/ING | 
| liŋgwe > limbe | ŋgw > mb | ᴹ✶liñwi > lhimb > N. lhim | ✧ Ety/LIW | 
| liŋgwit- > limbit- | ŋgw > mb | ᴹ√LINKWI > N. lhimmid | ✧ Ety/LINKWI | 
| -ŋgw- > -mb- | ŋgw > mb | ᴹ✶-ŋw- > ON. -mb- | ✧ PE19/23 | 
| ŋgwāla > mbāla | ŋgw > mb | ᴹ√ÑGWAL > N. baul | ✧ Ety/ÑGWAL | 
| ŋgwalaraukō > mbalaraukō | ŋgw > mb | ᴹ✶ñgwalaraukō > N. Balrog | ✧ Ety/RUK | 
| ŋgwalka > mbalka | ŋgw > mb | ᴹ√ÑGWAL > N. balch | ✧ Ety/ÑGWAL | 
| neŋgwe > nembe | ŋgw > mb | ᴹ✶NEÑ-WI > nemb > N. nem | ✧ Ety/NEÑ-WI | 
| riŋgwe > rimbe | ŋgw > mb | ᴹ√RINGI > rhimb > N. rhim | ✧ Ety/RINGI | 
| liŋkwe > limpe | ŋkw > mp | ᴹ√LINKWI > N. lhimp | ✧ Ety/LINKWI | 
| niŋkwe > nimpe | ŋkw > mp | ᴹ√NIK-W > N. nimp | ✧ Ety/NIK-W | 
| niŋkwirete > nimpirete | ŋkw > mp | ᴹ√NIK-W > N. nifred | ✧ Ety/NIK-W | 
| niŋkwit- > nimpit- | ŋkw > mp | ᴹ√NIK-W > N. nimmid | ✧ Ety/NIK-W | 
G. non-initial [kʷ] become [p]; [Xkʷ] > [Xp]
Phonetic Rule Elements
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Phonetic Rule Examples
| alkʷā > alpā | Xkʷ > Xp | ᴱ✶alchwa > G. alfa | ✧ GL/18 | 
| nṛkʷ- > nṛp- | Xkʷ > Xp | ᴱ√nṛq- > G. drib- | ✧ GL/30 | 
| talkʷa > talpa | Xkʷ > Xp | ᴱ✶talqă > G. talp | ✧ GL/69 | 
| tṝkʷa > tṝpa | Xkʷ > Xp | ᴱ✶tṝqă > G. tarb | ✧ GL/69 | 
ᴱT. labialized velars became labials; [{kgxɣŋ}ʷ-|ŋgʷ-|-ŋgʷ-] > [{pbfvm}-|b-|-mb-]
References ✧ PE12/17, 21; QL/38
Variations
Phonetic Rule Elements
|  | > |  | ✧ PE12/16 (k͡w > p) | 
|  | > |  | ✧ PE12/16 (g͡w > b) | 
|  | > |  | ✧ PE12/16 (x͡w > f) | 
|  | > |  | |
|  | > |  | ✧ PE12/16 (ȵ͡w > m) | 
|  | > |  | ✧ PE12/16 (ȵg͡w > b) | 
|  | > |  | ✧ PE12/16 (ȵg͡w > mb; medial) |