不ふ純じゅん物ぶつ

noun

impurity; foreign matter

Refers to unwanted substances mixed into a material, such as contaminants in water, air, food, or chemicals. Used in both technical and everyday language.

• この水みずには不ふ純じゅん物ぶつが含ふくまれている。

  This water contains impurities.

• 不ふ純じゅん物ぶつを取とり除のぞくためにフィルターを使つかう。

  Use a filter to remove foreign matter.