adit

n. [ L. aditus, fr. adire, aditum, to go to; ad + ire to go. ] 1. An entrance or passage. Specifically: The nearly horizontal opening by which a mine is entered, or by which water and ores are carried away; -- called also drift and tunnel. [ 1913 Webster ]

2. Admission; approach; access. [ R. ] [ 1913 Webster ]

Yourself and yours shall have
Free adit. Tennyson. [ 1913 Webster ]