Most textbook has multiple antonyms that can be used depending on the context. These antonyms include "least textbook," "unconventional," and "unorthodox." While most textbook refers to something that is standard, traditional, or widely accepted, using the antonyms can imply that the opposite is true. For example, if someone says, "This approach is the least textbook way to solve the problem," it suggests that the method is unique, creative, or innovative. Similarly, if someone describes a solution as "unconventional" or "unorthodox," it indicates a departure from the expected norm or tradition. Therefore, knowing the antonyms of most textbook can be helpful when you want to communicate an idea that challenges the conventional wisdom.