坑道(こうどう) こうどう noun mine tunnel; gallery; shaft building 1. mine tunnel; gallery; underground passage in a mine A horizontal or inclined passage dug underground for mining or military purposes. 坑道(こうどう)に入(はい)る。🔊 To enter the mine tunnel. 廃鉱(はいこう)の坑道(こうどう)が観光地(かんこうち)として整備(せいび)された。🔊 The tunnels of an abandoned mine were developed as a tourist attraction. 坑道(こうどう)の奥(おく)は暗(くら)くて湿気(しっけ)が多(おお)く、ヘルメットなしでは危険(きけん)だ。🔊 Deep inside the mine tunnel it is dark and humid, and it's dangerous without a helmet. Watch outHomophones: 坑道(こうどう) (mine tunnel), 行動(こうどう) (action), 講堂(こうどう) (auditorium). The kanji 坑(こう) belongs to mines and pits.Common collocations坑道(こうどう)を掘(ほ)る (to dig a tunnel)坑道(こうどう)内(ない) (inside the tunnel)UsageAlso used in military history for tunnels dug under enemy positions.Related words炭鉱(たんこう) (coal mine)鉱山(こうざん) (mine, the site)採掘(さいくつ) (mining, excavation) Related Words Related: 炭鉱(たんこう) (coal mine) Related: 鉱山(こうざん) (mine, the site) Related: 採掘(さいくつ) (mining, excavation) general Added 2026.3.22 20:54 · Revised 2026.10.8 3:51 18500/18685_koudou