Universal #889
Legacy number: 889
| Number | 886 |
| Original | A back unrounded vowel implies a front unrounded vowel at the same tongue height. |
| Standardized | IF there is a back unrounded vowel, THEN there is a front unrounded vowel of corresponding tongue height. |
| Formula | back unrounded vowel ⇒ front unrounded vowel |
| Keywords | unrounded, front, back, vowel, height |
| Domain | phonology |
| Type | implication |
| Status | achronic |
| Quality | absolute |
| Basis | 170 languages surveyed in Sedlak 1969 |
| Source | Sedlak 1969: 31 |
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