From Proto-Trengic to Proto-Ppwaro:
1. ŋ > n
2. m̰ n̰ > mː nː
3. b d g > w ɾ j
4. ᵐb ⁿd ᶮɖ͡ʐ ᵑg > pː tː sː kː
5. V[+breathy] > V[-breathy]
6. m(ː) {p(ː) k(ː)} > m(ː)ʷ p(ː)ʷ / _V[+round]
7. o u > e i / _j _Ci(ː)
8. o u > a o