Relation, Connection, Relevance, Correlation
noun, verbal noun, の adjective
If you take along some things that are related, you'll be able to understand their relation better.
かんれん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
IT関連の仕事をしています。
I do IT related work.
もしかすると、この問題は以前の問題と関連があるのかもしれません。
Perhaps this issue is related to the previous one.
あのユーザーは映画好きで、いつも映画関連のポストをしている。
That user is a movie buff and is always doing movie related posts.