What is the main attribute of an elusive concept?

An elusive concept is characterized by its difficulty in being defined or pinned down. It often escapes clear understanding or definitive explanations, which means it cannot be easily grasped or articulated. The term "elusive" suggests that such concepts can be ambiguous, complicated, or abstract, leading to varied interpretations and challenges in comprehension. This attribute is fundamental to what makes a concept elusive in nature.

In contrast, the other options reflect qualities that are opposite to what makes a concept elusive. For instance, a readily accessible concept would be straightforward and easy to reach; an easily grasped concept would imply that it can be understood with little effort; and a commonly accepted concept would suggest a consensus around its definition. Therefore, they do not align with the inherent ambiguity and complexity associated with elusive concepts.