The term "cold medium" refers to a type of communication that requires active participation and engagement from the receiver. This type of communication is characterized by minimal emotional and intellectual involvement, as the receiver is not required to invest much of their own thoughts and feelings into the interaction. Synonyms for "cold medium" include detached, impersonal, objective, and unfeeling. Other terms that could be used to describe this type of communication include distance, aloofness, and indifference. It is important to understand the different connotations associated with each of these synonyms, as they can convey different shades of meaning depending on the context in which they are used.