Graphemes: o
Classes: short mid back vowel
Implicit classes: vocalic
Features -long +back +syllabic +voice
Related rules
Origin
pwgmc-stressed-u: u > oDevelopment: Old English
north-pwgmc-nasalized-rounding-short: ą > ooe-diphthong-tensing: ai > ā, au > ēa, eu > ēo, iu > īooe-breaking-before-h: æ > ea / _h, e > eo / _h, i > io / _h, ī > īo / _h, ǣ > ēa / _hoe-breaking-before-rc-lc: æ > ea / _{r|l}C, e > eo / _rC, e > eo / _lh, i > io / _rC, i > ie / _lhoe-breaking-before-w: {e|i} > {eo|io} / _w!i, e > eo / _lwoe-short-vowel-syncopeoe-back-umlaut: i > io / _{l|r|[bilabial]}{u|a}, e > eo / _{l|r|[bilabial]|[labiodental]}uoe-epenthesis: ∅ > e / C_r#, ∅ > o / C_r#, ∅ > e / C_l#, ∅ > o / C_l#, ∅ > e / C_n#, ∅ > u / C_m#oe-unstressed-vowel-u: u > o