Underused (adjective)

Not used as much as is possible or necessary.

Origin:

From the prefix under- meaning less or not enough and the word used.

Examples:

1. The equipment was underused and in good condition.
2. The room was underused and could be repurposed.
3. The facility was underused and was in need of more customers.
4. The library was underused and the books were collecting dust.
5. The park was underused and was in need of more visitors.