The phrase "put a nutshell" means to express something briefly and concisely. However, there are several antonyms for this phrase that convey the opposite meaning. Some antonyms include elaborating, expanding, explaining in detail, giving an extensive account, and providing a comprehensive explanation. When one puts something in a nutshell, they summarize the main points, but antonyms allow for a more detailed analysis or explanation. In academic writing, using antonyms for "put a nutshell" helps to provide a thorough understanding of the topic and demonstrate a deep level of understanding. Therefore, both the phrase and its antonyms have their significance in different contexts, depending on the writer's intentions.