Unrelated
noun, な adjective, の adjective
If something has a nothing edge, it's probably unrelated to what you're doing. There's no edge, your stuff always has edges.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
この田舎道は、渋滞とは無縁です。
This country road is free from traffic jams.