INFJs, also known as the Advocate or the Counselor, are often considered hard to read due to their complex and multifaceted nature. Here are a few reasons why INFJs can be challenging to understand:

1. Introverted Intuition (Ni): INFJs primarily rely on their dominant function, introverted intuition, which is an internal and abstract way of perceiving the world. This function allows them to see patterns, connections, and possibilities that others may not notice. As a result, their thoughts and ideas can be difficult to follow or predict, making it hard for others to read their intentions or understand their perspectives.

2. Extroverted Feeling (Fe): INFJs also possess extroverted feeling as their auxiliary function, which means they are highly attuned to the emotions and needs of others. They are empathetic and often prioritize harmony and understanding in their relationships. However, this can lead to INFJs suppressing their own emotions or adapting their behavior to fit the expectations of others. Consequently, their true feelings and desires may remain hidden, making it challenging for others to gauge their true intentions.

3. Private and Reserved Nature: INFJs are known for being private individuals who tend to keep their thoughts and emotions to themselves. They often have a rich inner world that they may not readily share with others. This reserved nature can make it difficult for people to get a clear read on their thoughts, feelings, and motivations.

4. Complex Inner World: INFJs have a deep and complex inner world, which can be difficult for others to comprehend. They often spend a significant amount of time reflecting on their thoughts, values, and beliefs. This introspective nature can make it challenging for others to understand their perspectives or predict their actions.

5. Masking and Adaptability: INFJs are highly adaptable and skilled at blending in with different social situations. They often have a chameleon-like ability to adjust their behavior and adapt to the needs and expectations of others. This adaptability can make it challenging for people to discern their true selves or understand their underlying motivations.

6. Idealism and Depth: INFJs are driven by their strong values and a desire to make a positive impact on the world. They often have a deep sense of purpose and may be preoccupied with existential questions and philosophical ideas. This idealistic nature can make it difficult for others to fully grasp their motivations and understand the depth of their thoughts and emotions.

Overall, INFJs' complexity, introspection, adaptability, and idealism contribute to their enigmatic nature. While they may be challenging to read, taking the time to listen, observe, and engage in meaningful conversations can help others gain a deeper understanding of INFJs and their unique perspectives.