great ultimate, n.Definitions

Great Ultimate (n.) began ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠as an empty circle, and its chi first meant a ridgepole, on which yang and yin lean like the two sides of a roof.