Which word conveys the idea of unnecessary repetition?

The term "redundant" specifically refers to something that is unnecessary and repetitive, especially in the context of information or actions that do not add value. In communication, redundancy often manifests as repeating ideas or phrases that have already been expressed, making the message less clear and more cumbersome. This aligns perfectly with the idea of unnecessary repetition.

In contrast, "efficient" describes a state of achieving maximum productivity with minimum wasted effort or expense, which does not relate to repetition. "Concise" refers to expressing ideas clearly and briefly without unnecessary words, thus promoting clarity rather than redundancy. "Innovative" pertains to introducing new ideas or methods, which is unrelated to the concept of repetition. Therefore, "redundant" is the word that best captures the essence of unnecessary repetition.