Graphemes: ū
Classes: long back close vowel
Implicit classes: vocalic
Features +long +back +high -low +syllabic +voice
Related rules
Origin
pnwgmc-word-final-long-o: ō > ū / _#pwgmc-jj-ww: uww > ūw / _!j, ww > uw / _!j, j > i / _jDevelopment: Old English
post-pwgmc-monosyllabic-z: aiz > ā / C_, iz > ē / C_, uz > ū / C_