坑内掘り

Reading

Kana: こうないぼり

Romaji: kounaibori

Definition

noun

1

pit mining

Kanji

坑

Reading: コウ

Meanings: pit, hole

内

Readings: ナイ、 ダイ、 うち

Meanings: inside, within, between, among, house, home

掘

Readings: クツ、 ほ.る

Meanings: dig, delve, excavate