Frost uses alliteration in this poem, which is repeating the same consonant at the beginning of words in close proximity. Examples of this include "sound’s the sweep" in stanza two, with its repeated "s" sound and the "d" sound in "dark and deep" at the beginning of stanza three.
The poet personifies the horse, assigning to it human thought processes, such as thinking it is odd or "queer" that they are stopping for so long. He also seems to ask the poet if it a "mistake" they are standing so long in the woods.
Exaggeration is harder to find in this simple poem. However, one definition of exaggerate is to magnify. The poem as a whole stops and magnifies a very simple act of stopping to appreciate a snowy woods at night for a few extra minutes, the kind of fleeting experience that it is too easy to rush past and forget in a busy life.
In the third stanza, you find the most Alliteration, i.e. repetition of a consonant sound at the beginning of words, "He gives his h arness bells a shake"...
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