What does the term "indiscernible" mean?

The term "indiscernible" refers to something that is difficult or impossible to perceive or identify. The correct interpretation of "indiscernible" as "unable to be seen or understood" captures the essence of the word's meaning. It suggests that the object, idea, or detail in question eludes recognition or comprehension, often due to subtlety, ambiguity, or obscurity.

In contrast, other options present meanings that contradict this definition. "Easily recognized" and "clearly visible" imply clarity and straightforwardness, which is not aligned with the concept of being indiscernible. Similarly, "overly complex" suggests that something is confusing due to intricacy rather than being undetectable or unclear. Therefore, the term "indiscernible" is best understood as representing something that cannot be easily seen or understood.