Octosyllable
Quick answer: An octosyllable is an eight syllable verse line, the workhorse of medieval narrative and cousin of iambic tetrameter. See how poets keep it lively.
An octosyllable is a line of verse containing eight syllables. Like its ten syllable sibling the decasyllable, it belongs first to syllable-counting traditions: medieval French romance, Spanish ballads and Welsh and Latin hymnody all run on eight syllable lines defined by count rather than stress. In English the same length usually settles into iambic tetrameter, four rising beats.
This was the great storytelling line of the Middle Ages. Thousands upon thousands of octosyllabic couplets carried Arthurian romance, beast fable, dream vision and chronicle, because the short line moves quickly and rhymes arrive often enough to please a listening audience. When you read a verse romance in translation, the brisk trot you hear is usually the octosyllable doing its ancient job.
How It Works
Eight syllables make a short, swift line, as in this original couplet: 'She kept a map inside her glove / and never told us where it led.' In stress-based English verse those eight syllables usually pattern as four iambs, but the syllabic definition allows freer arrangements, and medieval poets exploited that freedom. The line's speed comes from its rhyme frequency: in couplets, a chime lands every eight syllables, which propels narrative but punishes padding, since a weak rhyme is never far from the reader's ear.
Where You Will See It
Chretien de Troyes wrote his Arthurian romances in octosyllabic couplets, and the form dominated French narrative for centuries. Chaucer used the English equivalent in his early dream visions, The Book of the Duchess and The House of Fame, before moving to the ten syllable line. John Gower's enormous Confessio Amantis runs in smooth octosyllabics. Later, Milton's 'L'Allegro' and 'Il Penseroso', Marvell's lyrics and Coleridge's 'Christabel' kept the eight syllable line supple, and Spanish romances still sing in octosyllables today.
How to Use It in Your Own Poems
Use octosyllabic couplets when you want to tell a story at walking pace with frequent rhyme. The form's twin dangers are jingle and filler: rhymes arrive so often that forced ones stand out, and the short line tempts you to pad with 'so', 'then' and 'quite'. Counter both by enjambing across couplets and letting sentences vary in length. For a purely syllabic exercise, write eight-count lines with roaming stress; the effect is quick but conversational, closer to told anecdote than to song.
What poets can take from this
- Enjamb across couplet boundaries so the frequent rhymes propel rather than punctuate.
- Ban filler words; an eight syllable line cannot absorb them invisibly.
- Vary sentence length across lines to keep narrative octosyllables from trotting mechanically.
- Study Christabel to hear the line loosened into four accents with flexible syllables.
- Save your best rhyme pairs for moments of plot turn, where the chime underlines the story.
Try it yourself
Retell a piece of neighbourhood gossip as a thirty-line narrative in octosyllabic couplets, keeping the pace brisk and letting the rhymes land like raised eyebrows.
Questions
Is an octosyllable the same as iambic tetrameter?
They overlap but differ in definition. An octosyllable counts eight syllables regardless of stress, while iambic tetrameter requires four iambic feet. In English most octosyllables read as tetrameter, but syllabic verse allows irregular stress.
Why was the octosyllable so popular for medieval narrative?
The short line suited recitation: rhymes arrived frequently, the rhythm was easy to follow aloud, and the couplets could run indefinitely. Romance writers like Chretien de Troyes made it the default engine of storytelling.
By the Writory editorial team, reviewed by working poets. Updated July 2026.
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