Unexpected (adjective)

Not expected; surprising.

Origin:

Late 16th century (as a noun in the sense "failure to expect"): from un- "not" + expected, past participle of expect.

Examples:

1. The sudden appearance of a bear in the camp was unexpected.
2. The news of her death was an unexpected shock.
3. The winner of the tournament was unexpected.
4. The thunderstorm during the picnic was unexpected and ruined the day.
5. The sudden change in the weather was unexpected and caught many people off guard.