坑こう道どうこうどうCommon wordFreq.FrequencyTop 50,000Meanings1nountunnel; gallery; level; shaft; pitPrimarily used for underground passages in mining contexts. Can refer to horizontal tunnels (galleries/levels) or vertical shafts, but 立坑 is more specific for vertical shafts.坑こう道どうの奥おくで鉱こう石せきを採さい掘くつしている。They are mining ore deep inside the tunnel.
