ADIT
Source: 524, 566, 567
ADIT, noun [Latin aditus, from adeo, aditum, to approach, ad and eo, to go.]An entrance or passage; a term in mining, used to denote the opening by which a mine is entered, or by which water and ores are carried away. It is usually made in the side of a hill. The word is sometimes used for aid-shaft, but not with strict propriety.
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adit. Adit, n. an entrance into a pit or mine, access
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Ad″it (�), n. [[L. aditus, fr. adire, �aitum, to go to; ad + ire to go.]] 1. 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.
2. 2. Admission; approach; access.
Yourself and yours shall have Free adit. Tennyson.