付ふ着ちゃく物ぶつ

noun

attached matter; deposit; accretion

Refers to any substance or material that has adhered to a surface, often unwanted or foreign. Used in technical, scientific, and everyday contexts.

• パイプ内ないの付ふ着ちゃく物ぶつを取とり除のぞく必ひつ要ようがある。

  We need to remove the deposits inside the pipe.

• 歯はの表ひょう面めんに付ふ着ちゃく物ぶつがたまると虫むし歯ばの原げん因いんになる。

  When matter accumulates on the tooth surface, it can cause cavities.