Simple examples:
* The child was found unaccompanied in the park.
* She traveled to Europe unaccompanied by her parents.
* He went to the concert unaccompanied.
More complex examples:
* The witness described seeing the suspect leave the scene unaccompanied.
* The airline policy requires all minors traveling unaccompanied to have a guardian meet them at the airport.
* The report highlighted the increasing number of unaccompanied minors crossing the border.
Using "unaccompanied" in a negative sense:
* The company's policy prohibits employees from leaving work unaccompanied during their lunch break.
* It is illegal to leave a child unaccompanied in a car.
Remember that "unaccompanied" means "without anyone else."