Speaking in a dull, monotonous way without changing pitch or emotion, often making people bored or sleepy.
From 'drone,' which comes from Old English 'drān,' originally referring to the male bee. The sound quality of a beehive—a continuous, monotonous humming—gave rise to the meaning of speaking dully without variation.
The connection between bee sounds and boring lectures is built right into the word itself! When you're 'droning on,' you're literally making your voice sound like a hive full of bees, and your listeners feel the same numbness a bee might experience.
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