In English poetry, accent refers to the stressed syllable of a polysyllabic word, or a monosyllabic word that receives stress because it belongs to an "open class" of words (noun, verb, adjective, adverb) or because of "contrastive" or "rhetorical" stress.
In basic analysis of a poem by scansion, accents can be represented by a short vertical line (') preceding the syllable, while the divisions between feet are shown by a slash (/).
[1] There is generally one accent in each foot, for example: This poetry-related article is a stub.
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