Fallow
Part of speech: noun
Definition: Ground ploughed and harrowed but left unseeded for one year. Uncultivated land. An area of fallow land.
Part of speech: adjective
Definition: Ploughed but left unseeded for more than one planting season. Inactive; undeveloped. A pale red or yellow, light brown; dun.
Part of speech: verb
Definition: To make land fallow for agricultural purposes.
Example sentence: I've never felt fallow in the sense that there's been no work.
Unexploited
Part of speech: adjective
Definition: Not exploited