fallow
fal-low
adjective
(Of farmland) left uncultivated for a period to restore its fertility.
"The farmer left the field fallow for a year."
adjective
Inactive or undeveloped; not currently in use or productive.
"Her creative talents lay fallow for years."
Thesaurus
Synonyms: unploughed, unplowed, unbroken, unexploited, undeveloped