天てん水すい

noun

rainwater; rain water

Refers to rainwater, especially when collected or used as a resource. Often appears in contexts like agriculture, gardening, or traditional water use.

• 天てん水すいをためて畑はたけにまく。

  I collect rainwater and water the field with it.

• この地ち域いきでは天てん水すいに頼たよった農のう業ぎょうが行おこなわれている。

  In this region, agriculture relies on rainwater.