Universal 1840:
- Original
- If a language has long raised low front unrounded vowels [æ:] then it also has long high back rounded vowels [u:].
- Standardized
- IF there is a long raised low front unrounded vowel, THEN there is also a long high back rounded vowel.
- Keywords
- vowel, round, high, low, long
- Domain
- phonology
- Type
- implication
- Status
- achronic
- Quality
- absolute
- Basis
- Maddieson’s UPSID-451 database
- Source
- Pericliev (i.p.)
- Counterexamples
Cf. #688.