Polysyndeton deliberately joins a series of words, phrases, or clauses with repeated conjunctions where ordinary prose might omit them. In poetry, the accumulating links can slow reading and make every item seem equally present, or they can create a rushing, overflowing momentum. Poets use the device to imitate a speaker's excitement, grief, prayer, exhaustion, or inability to stop naming what matters. Repeated conjunctions may also suggest that experiences are inseparable, producing a texture of abundance, persistence, or emotional pressure.

Polysyndeton slows a line’s movement because each repeated conjunction makes the reader register another item. A poet may use “and” to suggest abundance, breathlessness, accumulation, or childlike insistence, and “or” to create uncertainty or widening alternatives. Its opposite is asyndeton, which omits expected conjunctions for speed and compression.