Learn how to say Adjacency correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word adjacent:
1next to or adjoining something else:
the area adjacent to the station
2 Geometry (of a pair of angles) formed on the same side of a straight line when intersected by another line.
late Middle English: from Latin adjacent- ‘lying near to’, from adjacere, from ad- ‘to’ + jacere ‘lie down’