Classes: voiced bilabial nasal consonant +syllabic
Implicit classes: vowel V
Features: nasal +syllabic +voice labial sonorant -continuant
Related rules
Development: Ancient Greek
grk-vocalic-nasals: {m̥|n̥} > aDevelopment: Latin
lat-syllabic-sonorants: m̥ > em, n̥ > en, r̥ > or, l̥ > ol