Unsubstantial (adjective)

Not having a strong foundation or being solid or substantial.

Origin:

The word "unsubstantial" is formed from the word "un" and "substantial" which means having a strong foundation or being solid or substantial.

Examples:

1. The building was unsubsantial and in danger of collapse.
2. The argument was unsubsantial and easily debunked.
3. The evidence was unsubsantial and the case was thrown out of court.
4. The company's financials were unsubsantial and it was unable to secure funding.
5. The food was unsubsantial and left him feeling hungry soon after.