Assertion: diphthong's vowel | /r/HasProperty | ʊu
Facets:
value: in gen am
type: LOCATION
Source sentences:
text: I also disagree that the vowel of "loon" is [ʊu] in Gen Am.
text: The vowels /iː/ and /uː/, whose usual forms are in fact slightly diphthongal (close to [ɪi], [ʊu]), may undergo the same change and become [iː],