Antonyms for the word "slanguage street talk" are standard language, literary language, formal language, and proper language. Standard language refers to the formal and correct way of speaking or writing a language, which is understood universally. Literary language involves the use of elevated, creative, and polished language, typically found in notable works of literature. Formal language, on the other hand, is approved language, used in official and professional settings, such as in business or lors proceedings. Proper language pertains to the right or correct way of communicating in various social situations. All these antonyms exhibit the opposite of slanguage or street talk, conveying a more refined, sophisticated, and accepted way of communication in different contexts.