Incident
Case
noun
An action matter is really just something that happens. It's an incident or case.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
会社に向かっていると、ある事件が起こった。
There was an incident on my way to work.
この「盗まれたコウイチの下着」事件について、できるだけ早く報告してください。
Get back to me as soon as possible about the incident regarding Koichi’s stolen underwear.
一年前に起きた、フグがワニカニの腕を一本盗んで食べるという事件がようやく和解に至りました。
The case in which Fugu stole and ate one of the Crabigator's arms one year ago finally reached an amicable settlement.