Xian (Taoism)

Xian (Chinese: 仙/仚/僊; pinyin: xiān; Wade–Giles: hsien) is a Chinese word for an enlightened person, translatable in English as:

Xian semantically developed from meaning spiritual "immortality; enlightenment", to physical "immortality; longevity" involving methods such as alchemy, breath meditation, and T'ai chi ch'uan, and eventually to legendary and figurative "immortality".

The xian archetype is described by Victor H. Mair.

They are immune to heat and cold, untouched by the elements, and can fly, mounting upward with a fluttering motion. They dwell apart from the chaotic world of man, subsist on air and dew, are not anxious like ordinary people, and have the smooth skin and innocent faces of children. The transcendents live an effortless existence that is best described as spontaneous. They recall the ancient Indian ascetics and holy men known as ṛṣi who possessed similar traits.1994:376

According to the Digital Dictionary of Buddhism, Chinese xian (仙) can mean Sanskrit ṛṣi (rishi "inspired sage in the Vedas").

The most famous Chinese compound of xiān is Bāxiān (八仙 "the Eight Immortals"). Other common words include xiānrén (仙人 sennin in Japanese, "immortal person; transcendent", see Xiānrén Dòng), xiānrénzhăng (仙人掌 "immortal's palm; cactus"), xiānnǚ (仙女 "immortal woman; female celestial; angel"), and shénxiān (神仙 "gods and immortals; divine immortal"). Besides humans, xiān can also refer to supernatural animals. The mythological húlijīng 狐狸精 (lit. "fox spirit") "fox fairy; vixen; witch; enchantress" has an alternate name of húxiān 狐仙 (lit. "fox immortal").

...
Wikipedia