The word "佚名" is formed by combining the character "佚", which consists of the radical "人" (person) and the component "失" (lose), etymologically indicating a person who is lost or hidden, with "名", composed of "夕" (evening) and "口" (mouth), historically referencing the act of naming in dim light. Together, they literally mean "lost name" or "hidden name", conveying the concept of anonymity.