Tercet
Quick answer: A tercet is a three-line stanza or poem unit, from Dante's terza rima to the villanelle. Learn tercet types, rhyme schemes, and how to use them well.
A tercet is a unit of three lines of verse, whether a stanza within a longer poem or a complete three-line grouping linked by rhyme. Where the couplet balances, the tercet destabilises: three is an odd number, so something always leans forward, unresolved, into the next stanza. That built-in tilt is the form's secret engine and the reason poets choose it when they want motion rather than rest.
You will meet tercets everywhere once you look. They form the interlocking chain of Dante's terza rima, the repeating stanzas of the villanelle, the two halves of a Petrarchan sonnet's sestet, and the default stanza of a great deal of contemporary free verse, where three-line units offer a middle path between the couplet's starkness and the quatrain's squareness.
How It Works
Tercets come in several standard wirings. A triplet rhymes all three lines AAA, an emphatic, sometimes comic effect. Terza rima interlocks stanzas as ABA BCB CDC, each stanza's middle line seeding the next stanza's rhymes, which pulls the reader forward like links in a chain. Unrhymed free verse tercets rely instead on the shape itself: two lines to build, one to turn or land. An original unrhymed example:
The removal van swallows the piano first. / Rooms give up their echoes one by one. / Somewhere a smaller life is waiting, furnished.
Feel how the third line neither pairs with the first nor the second but pushes past both. That forward lean is what you are buying with three.
Where You Will See It
Dante built the entire Divine Comedy from terza rima, and Shelley borrowed the scheme for 'Ode to the West Wind', driving its storm forward stanza by stanza. The villanelle, as in Dylan Thomas's poem urging his father to resist death, spends five of its six stanzas in tercets. Wallace Stevens shaped 'The Snow Man' as five unrhymed tercets forming a single sentence, and William Carlos Williams devised a stepped three-line unit he called the triadic line. Among contemporary poets the plain unrhymed tercet may now be the most common stanza in literary journals.
How to Use It in Your Own Poems
Decide what job the third line does in your poem: complication, undercutting, or landing. Keeping that job consistent gives even free verse a formal feel. If you try terza rima, use slant rhyme in English to avoid strain, and remember the chain wants narrative or argument, something that travels. For meditative poems, unrhymed tercets with enjambment across stanza breaks create a graceful drift. Writory's judges score structure as one of five criteria, and a poem in disciplined tercets signals control before they have read a word closely.
What poets can take from this
- Give the third line of each stanza a consistent role, turn, landing, or complication.
- Use terza rima with slant rhymes in English; perfect rhymes across a long chain quickly sound forced.
- Let sentences cross stanza breaks occasionally so the tercets link rather than stack.
- Try recasting a stalled quatrain poem in tercets; losing one line per stanza often finds the poem's pace.
- Reserve the AAA triplet for special emphasis; three identical rhymes is a loud instrument.
Try it yourself
Write a poem in five unrhymed tercets about following someone through a city, in which every stanza's third line changes what the first two seemed to mean. End mid-pursuit.
Questions
What is the difference between a tercet and a triplet?
A tercet is any three-line unit, rhymed or unrhymed. A triplet is the specific case where all three lines share one rhyme, AAA, historically used as a variation within couplet poems or for emphatic effect.
What rhyme scheme is terza rima?
Terza rima interlocks tercets as ABA BCB CDC and so on, each stanza's middle line becoming the outer rhyme of the next. Dante invented it for the Divine Comedy, and poems in it usually end with a single line or couplet closing the final rhyme.
Is a haiku a tercet?
In English printing, usually yes: haiku conventionally appear as three lines, so they take a tercet's shape. Japanese haiku, though, are written as a single vertical line, so the three-line form is a translation convention rather than a rule.
By the Writory editorial team, reviewed by working poets. Updated July 2026.
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