What adjective best describes something that is delicate or difficult to analyze?

The adjective "subtle" effectively captures the essence of something that is delicate or difficult to analyze. In many contexts, subtlety implies nuances and complexities that require careful consideration and thought to grasp fully. For example, subtle details in a situation or a piece of art may not be immediately apparent and necessitate a deeper level of scrutiny to appreciate their significance.

On the other hand, options like "obvious," "clear," and "rough" imply a straightforwardness or simplicity that contrasts with the idea of delicacy or the need for careful analysis. Something described as obvious or clear lacks the intricacies that require deeper thought, while rough suggests a lack of finesse or delicacy altogether. Thus, "subtle" stands out as the most fitting descriptor for something that is delicate or challenging to analyze.