Revealer

A revealer is a noun that refers to a person or thing that reveals or discloses information, truth, hidden details, or previously unknown phenomena. The word is formed from the verb reveal plus the agent suffix -er, describing someone or something that performs the act of revealing.

In everyday language and professional contexts, a revealer can be a person who uncovers secrets or information, as well as a device, method, or process that makes something visible or understandable. In science and technology, tools and techniques that expose hidden properties—such as imaging methods, analytical instruments, or data-processing procedures—can be described as revealers. In journalism and investigation, evidence, clues, or sources that bring to light previously concealed facts may be called revealers of truth.

In culture and media, the term is sometimes used as a title or name for a fictional device, artifact, or character whose function is to uncover secrets or unveil important information. Although not a common technical term, revealers appear in speculative fiction, video games, and other narrative forms as plot devices that expose hidden information to the audience or protagonists.

See also: reveal, revelation, uncovering, disclosure.