Extended iambic pentameter describes a poetic line that exceeds the standard five iambic feet through the addition of extra syllables—such as a feminine ending (sixth unstressed syllable) or mid-line expansion—while retaining the underlying iambic pulse; this technique, used by Shakespeare (“To be, or not to be: that is the question”) and Milton, allows for syntactic flexibility, emotional emphasis, or rhetorical flourish without abandoning metrical coherence, creating tension between regularity and expressive deviation.

Iambic pentameter with added syllables or feet; often disrupts or elaborates normal rhythm. Creates variation and interest. Use for emotional shifts or natural speech. Study Shakespeare’s late plays. Avoid making it seem like an error. Enhances flexibility of blank verse.