1The state of not being happy; refers to sad events, bad luck, or disaster. Also used as a na-adjective.
不幸な事故で、多くの人が命を落とした。
Many people lost their lives in an unfortunate accident.
彼女は不幸な結婚生活から抜け出す決心をした。
She decided to get out of her unhappy marriage.
不幸中の幸いで、けが人は出なかった。
As a small mercy amid the misfortune, no one was injured.
自分を不幸だと思う人ほど、他人と比べてしまう傾向がある。
People who consider themselves unhappy tend to compare themselves with others more.
2A euphemism mainly for the death of a family member; used in the form ご不幸 to express condolences.
山田さんのお宅に不幸があったそうだ。
I heard there was a death in the Yamada family.
ご不幸があったと伺い、心よりお悔やみ申し上げます。
I heard of your loss, and I offer my deepest condolences.