Here's a breakdown:
* Repetition: The key element is the repetition of the same vowel sound.
* Internal Rhyme: The repetition often creates a type of rhyme, but it's internal to the phrase or sentence, not between lines.
* Effect: Assonance can create a variety of effects, including:
* Melody: The repeated vowel sounds can create a musical effect.
* Emphasis: The repetition can emphasize certain words or phrases.
* Atmosphere: Assonance can contribute to the overall mood or atmosphere of a piece of writing.
Examples:
* "The rain in Spain falls mainly on the plain." (repetition of the "ai" sound)
* "Old age should burn and rave at close of day; Rage, rage against the dying of the light." (repetition of the "a" and "e" sounds)
* "The silken sad uncertain rustling of each purple curtain." (repetition of the "u" and "i" sounds)
Assonance is a powerful literary device that can be used to enhance the impact of a piece of writing. It's often used in poetry and prose to create a more memorable and engaging experience for the reader.