Unfortunately, something bad happens unexpectedly.
You've probably heard this word before in conversations or news reports, and it's used when something goes wrong at the worst possible time. When you're trying to relax on vacation, but your flight gets delayed - that's unfortunate. Or imagine you were really looking forward to a big event, like a wedding or graduation, but it gets cancelled due to bad weather - that's unfortunate too. The word is often used when something doesn't go as planned, and it can add a hint of disappointment or sadness to the situation.
Happening through bad luck, or because of some unfortunate event.
