根こん底てい

noun

root; basis; foundation

Refers to the fundamental basis or underlying foundation of something, often used in abstract contexts such as ideas, systems, or principles.

• この問もん題だいの根こん底ていには、教きょう育いく制せい度どの欠けっ陥かんがある。

  At the root of this problem is a flaw in the education system.