yin

1. N-UNCOUNT In Chinese philosophy, yin is one of the two opposing principles whose interaction is believed to influence everything in the universe. Yin is negative, dark, and feminine, while yang is positive, bright, and masculine. (中国哲学的)阴

...a perfect balance of yin and yang. ...阴阳的绝对平衡。

...a silver chain with a ying-yang symbol. ...一条带有阴阳符号的银链子。