The word "unexpected" means something that is not anticipated or predicted, and comes as a surprise. It can refer to an event, action, or outcome that is surprising or unexpected.
Usage examples
The unexpected arrival of my long-lost friend at the party surprised everyone.
I received an unexpected bonus at work, which was a pleasant surprise.
The sudden downpour was entirely unexpected, and we didn't have umbrellas with us.
We had planned a quiet evening at home, but the unexpected visit from my parents changed our plans.
The unexpected news of her engagement took everyone by surprise.
During our hike, we stumbled upon an unexpected waterfall, making the trip even more exciting.
The unexpected power outage caused chaos in the building as nobody was prepared for it.
The unexpected cancellation of the flight caused inconvenience for all the passengers.
The unexpected resignation of our boss created uncertainty among the team members.
However, poverty manifests itself often in unexpected ways in the classroom, and there are specific strategies schools and families can use to help students succeed. (educationnorthwest.org)
You do not have a steady stream of income coming in anymore and you can not simply ask your boss for overtime if you are stuck with unexpected expenses from a disaster. (rentersinsurance.net)
A student who sets aside just 10 percent of each paycheck can see how a savings account will be helpful in the event of unexpected expenses. (cheapscholar.org)