発はっ生せい源げん

noun

source; origin

Refers to the point or place where something originates, such as a fire, pollution, sound, or problem.

• 火か災さいの発はっ生せい源げんを特とく定ていするのは難むずかしい。

  It is difficult to identify the source of the fire.

• この川かわの汚お染