堆たい積せき物ぶつ

noun

sediment; deposit

Refers to material that settles or accumulates, often in geological, environmental, or industrial contexts.

• 川かわ底ぞこに堆たい積せき物ぶつがたまっている。

  Sediment has accumulated on the riverbed.

• この地ち域いきの堆たい積せき物ぶつから化か