Unsupported (adjective)

1. Not sustained, carried, or held up by anything; without foundation or base.
2. Not having the aid, comfort, or resources needed for a task or purpose.
3. Not upheld or defendedend by evidence, proof, or authority.

Origin:

Late 16th century from un- (expressing negation) + supported.

Examples:

1. The argument was deemed unsupported by the evidence presented.
2. The bridge was deemed unsafe due to unsupported pilings.
3. The athlete performed an unsupported handstand.
4. The claims made in the article were unsupported and misleading.
5. Her position on the issue was unsupported by any facts or data.