Diforc'hioù etre adstummoù "Rontder (yezhoniezh)"

Diverradenn ebet eus ar c'hemm
[[Image:Exoendo.png|left|200px|thumb|Nann-rontadur, distaget gant ur [[svedeg|svedegerez]].]]
Daou doare rontder disheñver ez eus: '''rontadur endogweuzek''' (pe $"compreseedmoustret") ha '''rontadur ezogweuzek''' (pe $"protrudedkoagennek").
In endolabial rounding, the corners of the mouth are drawn slightly together and the lips may be compressed horizontally, but the lips do not protrude and only their outer surface is exposed. In exolabial rounding, the lips protrude like a tube, as when [[kiss]]ing; the inner surface of the lips is exposed. Usually, back rounded vowels are exolabial, while front rounded vowels are endolabial. However, in [[Japanese language|Japanese]], the back high vowel is endolabial. [[Swedish (language)|Swedish]] is unusual in that dialects of it make a [[phoneme|phonemic]] distinction between the two types, having unrounded, endolabial, and exolabial front [[close-mid vowel]]s. Some varieties of [[Dutch (language)|Dutch]] make the same distinction. There is no dedicated IPA diacritic to represent this contrast, and without disambiguation both the word "rounded" and the symbols for the rounded vowels are understood to refer to exolabial rounding.
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