ファンダメンタル

na-adjective

fundamental; basic; foundational

Used as an adjectival noun to describe something that is essential, underlying, or forming the basis of something. Often used in technical, economic, or analytical contexts.

• この問もん題だいのファンダメンタルな原げん因いんを探さぐる必ひつ要ようがある。

  We need to investigate the fundamental cause of this problem.