bitter root
... bitter principle of grape fruit 葡萄柚苷, 朱栾苦素 bitter root 苦根 bitter salt n. [化]硫酸镁, 泻盐 ...
underlying cause of poverty
... 苦干 to work hard 苦根 underlying cause of poverty 苦寒 bitter cold ...
Bitterroot
Origin of Pain
scourge