flutiest

/ˈfluːtiɪst/
adjective
  1. Having a sound that is light, clear, and high-pitched, like a flute.
    • The flutiest notes of the songbird filled the morning air.
    • Her voice had a flutiest quality that made her perfect for the choir.
    • The wind whistled through the reeds with a flutiest tone.
Synonyms
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