Unimproved

Part of speech: adjective (a.)

1. Not improved; not made better or wiser; not advanced in knowledge, manners, or excellence.

2. Not used; not employed; especially, not used or employed for a valuable purpose; as, unimproved opportunities; unimproved blessings. Cowper.

3. Not tilled, cultivated, or built upon; yielding no revenue; as, unimproved land or soil.