adit
/ˈædɪt/noun
- a horizontal passage leading into a mine for the purposes of access or drainage（进入矿井或排水用的）横坑道, 平峒。
词源
early 17th cent.: from Latin aditus 'approach， entrance'， from adit- 'approached'， from the verb adire, from ad- 'towards' + ire 'go'.