非ひ円えん唇しん

noun which may take the genitive case particle 'no', noun

unrounded

Technical term in phonetics describing vowels produced without lip rounding. Used attributively with の, as in 非円唇母音 (unrounded vowel).

• 日本にほん語ごの「イ」は非ひ円えん唇しん母ぼ音いんです。

  The Japanese 'i' is an unrounded vowel.