Classes: short close-mid back rounded vowel
Implicit classes: vocalic V
Features: -long -high -low +back +round +syllabic +voice
Related rules
Origin
lat-laryngeals: H > ∅ / #_C, h₁e > e, h₂e > a, h₃e > o, Ho > o, {eh₁|ēh₂|h₂ē} > ē, {eh₃|oH} > ō, eh₂ > ā, H > a / C_Clat-syllabic-sonorants: m̥ > em, n̥ > en, r̥ > or, l̥ > ollat-e-o: eu > ou, e > o / _u̯lat-a-after-labial: o > a / #{m|u̯|kʷ|gʷ|gʷʰ}_lat-ouvc-syncope: ou̯V > ū / _Clat-cl-monophtongization: ou > ū, ei > e / _{V|u̯}, ei > ī