Why “yugen” is a great word
A profound Japanese aesthetic ideal of subtle, mysterious beauty and grace that evokes a deep emotional awareness beyond what can be fully articulated. From Japanese 幽玄 (yūgen), from Middle Chinese 幽玄 (ʔjuw hwen, "deep, profound; mysterious, dark"). Unlike *iki*, which conveys a chic, worldly urbanity, or *wabi-sabi*, which finds beauty in rustic imperfection and transience, *yūgen* is the profound mystery that lies behind and beyond form. It is the mountain shrouded by mist, the solitary boat disappearing beyond a distant island, and the silence that follows the last note of a temple bell—a quiet recognition of a universe whose deepest resonance lies just past the threshold of perception.
Definitions & examples from Wiktionary (CC BY-SA 3.0).