a figure of speech in which the same sound appears at the beginning of two or more words. Alliterative words are consecutive or close to each other in the text.
Example From Text
By chance or natures changing course untrimm'd.
Shakespeare again uses alliteration with the words "chance" and "changing," as he repeats the "ch" sound. This line expands on the line before (which also contains alliteration), by saying luck or natural decline are the reasons things lose their beauty.