An anapaest (/ˈænəpiːst, -pɛst/; also spelled anapæst or anapest, also called antidactylus) is a metrical foot used in formal poetry. In classical quantitative meters it consists of two short syllables followed by a long one; in accentual stress meters it consists of two unstressed syllables followed by one stressed syllable. It may be seen as a reversed dactyl. This word comes from the Greek ἀνάπαιστος, anápaistos, literally "struck back" and in a poetic context "a dactyl reversed".
Because of its length and the fact that it ends with a stressed syllable and so allows for strong rhymes, anapaest can produce a very rolling verse, and allows for long lines with a great deal of internal complexity.