根源

根源 [gēn yuán]

1. ■ source; origin; grass roots; root; fountain; fountainhead; radix; bottom:

社会根源 social roots;

思想根源 ideological root-cause;

历史根源 historical roots;

它的根源在于嫉妒。 It has its source in envy [jealousy].

不注意清洁是各种疾病的根源。 Uncleanliness is the root of various diseases.