unrounded

/ʌnˈraʊndɪd/
adjective
  1. Describing a vowel sound made with the lips spread or neutral, not rounded.
    • The 'ee' in 'see' is an unrounded vowel.
    • Linguists classify the vowel in 'father' as unrounded.
    • She practiced unrounded sounds to improve her accent.
Antonyms
What does "unrounded" mean? | whatsthatwordmean | whatsthatwordmean