坑口[koukou] pithead
坑道[koudou] tunnel
坑内[kounai] within a pit or (mine) shaft
坑内事故[kounaijiko] mine accident
入坑[nyuukou] entrance into drift or pit

廃坑[haikou] abandoned mine
金坑[kinkou] gold mine
坑夫[koufu] miner
炭坑[tankou] coal mine
銀坑[ginkou] silver mine

縦んば[yoshinba] even if
才気縦横[saikijuuou] great wisdom
車両縦隊[sharyoujuutai] convoy
縦横無尽[juuoumujin] freely
縦貫[juukan] running through

縦縞[tatejima] vertical stripes
縦書[tategaki] vertical writing
縦旋盤[tatesenban] vertical turning lathe
縦線[juusen] vertical line