Final answer:
The figurative language device used in the bolded text from William Wordsworth's poem is a Metaphor, which vividly describes the woman's captivating and ethereal qualities.
Step-by-step explanation:
In the poem "She was a Phantom of delight" by William Wordsworth, the figurative language device present in the bolded text is Metaphor. Wordsworth describes the woman not as a literal phantom, but uses the metaphor to convey the ethereal and captivating qualities she possesses.
By comparing her to a 'Phantom of delight,' he emphasizes her alluring and enchanting nature. This metaphor does not exaggerate or align objects in a literal sense, as hyperbole and allusion would, nor does it rely on repetitive consonant sounds as in alliteration.
Instead, it draws a comparison that ignites the imagination and reveals an intrinsic quality of the woman, much like comparing caramel to burnt sugar in the provided example by Laura Kasischke. This approach is a hallmark of Wordsworth's poetry, often layering deeper meanings through figurative language.