坑道 (こうどう)tunnel; (mining) gallery; level

坑道, its kanji, and other words that share them.Open this graph

Kanji in 坑道

坑内こうないwithin a pit or (mine) shaft
坑口こうこうpithead; minehead
廃坑はいこうabandoned mine; disused mine
たて坑たてこうshaft (e.g. in a mine); pit
ひ押し坑道ひおしこうどうdrift (mining); driftway
ひ押坑道ひおしこうどうdrift (mining); driftway
入坑にゅうこうentrance into drift or pit
坑こうpit (esp. of a mine)
北海道ほっかいどうHokkaido (island, prefectural-level administrative unit)
報道ほうどうreport (of news); reporting
道みちroad; path
道路どうろroad; highway
都道府県とどうふけんprefectures (of Japan); largest administrative divisions of Japan: Tokyo-to, Osaka-fu, Kyoto-fu, Hokkaido and the remaining prefectures
鉄道てつどうrailroad; railway
報道陣ほうどうじんpress corps
柔道じゅうどうjudo

See how 坑道 connects to the rest of Japanese.