A recursive echo is a poetic technique wherein a word, phrase, or structural motif reappears at multiple levels of a poem—not merely as repetition but as a transformed iteration that comments on, complicates, or deepens its earlier instance—creating a self-referential loop that mirrors cognitive or emotional recursion; for example, a refrain that subtly alters its wording with each recurrence to reflect shifting psychological states allows the echo to function as both anchor and evolution, generating thematic density through layered return rather than static recurrence.

Recursive echo repeats a phrase with slight variation each time, evolving meaning through iteration; useful for exploring memory or obsession—track semantic drift across repetitions.