A short, sharp, high-pitched bark or cry, usually made by a small dog or other animal.
From imitative origin, possibly influenced by 'yap' and 'yelp.' It became standardized in English by the late 1800s as onomatopoeia describing high-pitched animal sounds.
Small dogs have smaller vocal cords, which literally produce higher frequencies—so a 'yip' from a Chihuahua versus the 'bark' of a Great Dane isn't just about attitude, it's about physics: pitch rises as sound-producing structures get tinier.
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