Unaided (adjective)

1. Not having received help or support.
2. Not having had the assistance of tools or equipment.

Origin:

Late 16th century: from un- (expressing negation) + aided, past participle of aid.

Examples:

1. She passed the difficult exam unaided by any outside resources.
2. The rescue mission was successful because the team of divers worked unaided.
3. The unaided eye can spot the constellation in the clear night sky.
4. Despite unaided efforts, the fire could not be put out.
5. The unaided senses can only take us so far in our understanding of the world.