Isoliteral
An isoliteral poem is a constrained poem in which the words follow a rule based on letter count. In its strictest form, every word in the poem contains the same number of letters. A three-letter isoliteral poem uses only three-letter words. A four-letter isoliteral poem uses only four-letter words. The challenge is to create meaning, rhythm, and image while obeying a narrow word-length rule.

An isoliteral poem often includes: words of equal letter count, compact diction, simple syntax, strong attention to word choice, and a puzzle-like constraint hidden beneath the poem’s surface. The poem may be serious, playful, spiritual, descriptive, comic, or surreal. Because the poet has fewer words available, the language often becomes plain, compressed, and surprising.

To write an isoliteral poem, choose the number of letters each word must contain. Three-letter and four-letter versions are easiest. Five-letter versions allow more flexibility. Write a draft using only words with that exact number of letters. Then revise for sense, music, and image. Do not let the poem become only a word game. The constraint should sharpen the poem, not replace it.

Fog and Sea

The fog hid the old bay,
The low sun met the sea,
The one gull cut the air,
Yet few men saw our God.

“Fog and Sea” is a three-letter isoliteral poem because every word contains three letters. The poem uses the constraint to create short, clear images: fog, bay, sun, sea, gull, air, men, and God. The restricted vocabulary gives the poem a spare and quiet tone.

A stricter isoliteral poem requires every word to contain the same number of letters. A looser WoPoLian variation may require each line to use a different fixed letter count, such as three-letter words in line one, four-letter words in line two, and five-letter words in line three. Another variation may allow repeated small function words, such as “a” or “I,” while keeping all major words isoliteral.

The poet may break the rule by allowing one word of a different length for emphasis. If this is done, the broken word should matter. For example, a four-letter isoliteral poem about grief might end with the single word “I,” making the break visible and meaningful. Isoliteral writing is a traditional constraint device rather than a fixed historical poem form. In WoPoLi, it may be treated as a poetic form when the equal-letter rule governs the whole poem.