What is a sound like a half-formed whistle, expressing astonishment, scorn, or dislike. Whew duck, the European widgeon. [Prov. Eng.] called?

whew — A sound like a half-formed whistle, expressing astonishment, scorn, or dislike. Whew duck, the European widgeon. [Prov. Eng.]. (Webster's 1913.)

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