The phrase "putting in a nutshell" means to summarize something in a concise manner. Antonyms of this phrase would be to elaborate on or expand upon something. Rather than providing a brief summary, antonyms would involve providing specific details and in-depth analysis. Some other antonyms for "putting in a nutshell" might include: unpacking, expounding, elaborating, unfolding, or dissecting. Essentially, anything that implies a deep dive into a topic would be an antonym for this common phrase. Antonyms for "putting in a nutshell" can be useful when more information is needed to fully understand a subject or topic.