The word "trebles" in Alfred Lord Tennyson's poem "The Brook" is not technically onomatopoeia.
Here's why:
* Onomatopoeia: This literary device uses words that imitate the sounds they describe. Think of words like "buzz," "sizzle," "crash," or "meow."
* "Trebles" in "The Brook": Tennyson uses "trebles" to describe the sound of the brook, but the word itself doesn't directly mimic the sound.
However, the surrounding imagery and language *contribute* to the overall sense of sound and movement:
* "Trebles" is used in a line with words like "little breezes" and "rustling grass," which creates a sense of light, airy sounds.
* The poem's overall rhythm and rhyme scheme also contribute to the sense of flowing water and the gentle sounds of nature.
While "trebles" itself isn't onomatopoeia, it's part of a larger network of words and techniques that evoke the sound of a brook.