Nonfunctional (adjective)

Not functional; not capable of performing a specified function or fulfilling a specified purpose.

Origin:

From non- + functional.

Examples:

1. The elevator was nonfunctional and the maintenance crew was called to repair it.
2. The old computer was nonfunctional and had to be replaced.
3. The nonfunctional website was taken down for repairs.
4. The nonfunctional factory was closed and the workers were laid off.
5. The nonfunctional car was sold for scrap.