Today’s word from AWAD website:

adit (AD-it) noun

  1. Access; entrance; admission.

  2. A nearly horizontal passage leading into a mine.

[From Latin aditus (approach, entrance), from adire (to approach), from ire (to go). Ultimately from Indo-European root ei- (to go) that is also the ancestor of words such as exit, transit, circuit, itinerary, and obituary.]