Fallow (adjective)

1. Left unseeded during a growing season in order to restore its fertility as part of a crop rotation or to avoid surplus production.
2. Not in active use or development; inactive.

Origin:

From old english fealgian "to rest, lie fallow", from fealga "fallow land, a period of rest", from proto-germanic *falgaz, of uncertain origin. the noun fallow land comes from the adjective.

Examples:

1. The farmer left the field fallow for a year to let the soil recover its nutrients.
2. The fallow land was covered in tall grass and wildflowers.
3. The company decided to leave the project fallow for a year and re-evaluate it later.
4. The new law will require farmers to leave a certain percentage of their land fallow to preserve biodiversity.
5. The fallow period of the industry has come to an end and a new era of growth is expected.