half-dugout

a primitive shelter, often temporary, having a significant portion of its structure dug below ground level; commonly has sod walls and a sod roof.

構造のかなりの部分が地表面より下に掘り下げられた原始的なシェルター（しばしば一時的なもの）；一般に芝の壁と芝の屋根を持つ