When we use the phrase "traffics in", we generally refer to an individual or business entity that trades in illegal or unethical goods. Some synonyms for "traffics in" are deals in, peddles, sells, distributes, trades, smuggles, imports, and exports. All these words imply that someone is involved in the illicit exchange of goods, often with an intention of making a profit. For instance, drug dealers traffic in narcotics, arms dealers traffic in weapons, and human traffickers traffic in people. While some activities may be legal, such as trading in luxury goods, using the phrase "traffics in" generally has negative connotations.