坑こうTop 35000MeaningsNounSuffix1. pit (esp. of a mine)Kanji used坑pitPitch accentこうUsed in vocabulary立たて坑こうshaft (e.g. in a mine); pitNoun岩がん塩えん坑こうsalt mineNoun試し掘くつ坑こうtest pit; pilot tunnelNoun