竪たて穴あな

noun

vertical pit; shaft

A hole or shaft that goes straight down, as opposed to a horizontal tunnel. Often used in archaeology (竪穴住居) and mining.

• 遺い跡せきから竪たて穴あな住じゅう居きょの跡あとが見みつかった。

  Remains of pit dwellings were found at the archaeological site.

• 鉱こう山ざんの竪たて穴あなはとても深ふかい。

  The mine shaft is very deep.