An iamb is a metrical foot used in poetry that consists of two syllables. The first syllable is unstressed, while the second syllable is stressed, creating a rhythmic pattern. This pattern can be found in various forms of poetry, including Shakespearean sonnets and blank verse, making it a fundamental element of English verse. Iambs are often combined to form longer lines, such as in iambic pentameter, which contains five iambs per line. This structure contributes to the musical quality of poetry and helps convey emotions and themes effectively. Understanding iambs can enhance the appreciation of poetic works.