yin
/jɪn/noun
- (in Chinese philosophy) the passive female principle of the universe, characterized as female and sustaining and associated with earth, dark, and cold阴（中国古代哲学认为存在于宇宙万物间的一个被动阴性本原, 特点是温顺坚韧, 并与地、暗、寒有关）。与YANG相对。
词源
from Chinese yīn 'feminine'， 'moon'， 'shade'.