Both share a meaning of complicated, but the former is more with human action, actually it is a person in its one definition; the latter--nature. Yes, we know human is more sophisticated than nature. the word sinus--竇 reminds us a tragedy--"dou4e2 yuan"...竇E is Chinese, China is Sino-, the story of Sino- lady 竇E is full of sinuosity.
The Injustice to Dou E (竇娥冤 Dou E Yuan), also known as The Injustice Done to Tou Ngo and Snow in Midsummer, is a Chinese drama by Guan Hanqing during the Yuan Dynasty. This is one of Guan's most popular works, even in modern times.
The story describes the young widow Dou E from Chouzhou (楚州) whose hu*****and Cai (蔡) died two years after marrying. Dou was wrongfully accused by Zhang Lür (張驢兒, literally "The Mule Zhang") of the murder of his father, when Dou E refused to marry Zhang Lür. Before her execution (scene: 斬竇娥 "Zhai Dou E"), Dou E swore that her innocence would be proven by the upcoming abnormalities:
- dripping blood that never drops on the ground,
- snow in the midst of summer, and
- a three-year long drought in Chouzhou
And all those, including the eerie "Snow in June" (scene: 六月雪 "Liu Yue Xue") did occur. After the ghost of Dou E revealed the injustice to her father - Dou Tianzhang (竇天章), who eventually became a liangjunliefangshi inspector (兩淮廉訪使) - Inspector Dou put the corrupt officials and Zhang Lür to justice at the end of the story.
The story has been repeatedly used and modified by later dramatists.