神奧 is a Chinese word that means mysterious or enigma.

This version of enigma or mystery is somewhat spiritual - as if the soul is the puzzle to be solved.

緣 represents the fate that brings and bonds people together.

緣 is a complicated single character. It can mean a lot of different things depending on how you read it.

In Japanese, it can mean fate, destiny, a mysterious force that binds two people together, a relationship between two people, bond, link, connection, family ties, affinity, opportunity, or chance (to meet someone and start a relationship). It can also mean “someone to rely on,” relative, reminder, memento, or the female given name, Yori.

It's the same in Chinese, where it's defined as cause, reason, karma, fate, or predestined affinity.

In the Buddhist context, it's Pratyaya. This is the concept of indirect conditions, as opposed to direct causes. It's when something happens (meeting someone) by circumstance or a contributing environment. Instead of a direct cause or act, it is a conditioning cause without direct input or action by the involved people.

Occasionally, this character is used in a facetious way to say hem, seam, or edge of clothing. In this case, it's the seam that brings or holds the clothing together.

Note: Japanese will tend to use the variant of this Kanji shown to the right. If you want this version (and are ordering this from the Japanese master calligrapher), click on the Kanji at the right instead of the button above.

玄人 literally means “Mysterious Person/Woman.”

In Japanese, this is associated with a “geisha,” which matches this definition of a “mysterious woman.” However, this is the colloquial way to say “professional geisha” or “expert prostitute” in Japanese. It, therefore, might not be what you want on your wall.

Notes: This is a "Japanese only" term, though a Chinese person who sees these characters will think of a geisha or an alluring Japanese female musician.
While not often seen in Korean Hanja, this would mean a "dark woman," as in a woman that you cannot easily see through.

神秘 can be used as a noun or as an adjective to describe something mysterious.

蓮華智 is the lotus or mystic wisdom of Amitābha.

It's one of the five kinds of wisdom in Buddhism.

幽玄 is the Chinese, Japanese Kanji, and old Korean Hanja word meaning dim, deep, mysterious, subtle grace, hidden beauty, mysterious profundity, elegant simplicity, or subtle and profound.

This can also be the Japanese personal name Yuugen or Yugen.