The word "introduces" refers to the act of presenting someone or something to others. The opposite of this word is "excludes," which means to leave someone or something out or to prevent them from being included. Another antonym for "introduces" is "conceals," meaning to hide or keep something secret, rather than revealing it to others. Similarly, "suppresses" is also an antonym, as it means to prevent the dissemination of information or to keep it from becoming widely known. "Omits" is another word that is opposite to "introduces," referring to the act of leaving out information or not mentioning something.