Which term describes the action of portraying or describing something in accurate detail?

The term that best describes the action of portraying or describing something in accurate detail is "delineate." This word specifically refers to outlining, defining, or precisely representing something, which aligns perfectly with the idea of providing an accurate depiction or description. When someone delineates a concept or an object, they are carefully detailing its features, shape, and boundaries in a way that enhances understanding.

In contrast, "elucidate" means to clarify or explain something, but it does not necessarily imply a visual or precise representation. "Embroil" refers to involving someone in conflict or turmoil, which is unrelated to the action of describing something accurately. "Minimize" means to make something smaller or less significant, which also does not connect to the task of accurate portrayal.

Therefore, "delineate" is the most appropriate choice as it captures the essence of accurately describing something in detail.