The deep, prolonged sound that cattle make; mooing.
From Old English 'hlōwan,' related to German 'löwe' and Dutch 'loeien.' The verb developed from imitating the actual sound cows produce, making it onomatopoetic in origin.
Farmers for thousands of years have used 'lowing' to describe cattle sounds, and the word itself sounds like a gentle moo when you say it slowly. In pastoral poetry, lowing cows became a symbol of peaceful, rural life.
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