unimproved

adjectives

not made more desirable or valuable or profitable; especially not made ready for use or marketing
"taxes on unimproved land are low"; "unimproved dirt roads"
antonym
is similar to
(of roads) not leveled or drained; unsuitable for all year travel
is similar to
(of domestic animals) not selectively bred
(of land) not cleared of trees and brush; in the wild or natural state
"a farm with 50 acres of unimproved and 68 acres of improved land"; "unimproved woodlands"
is similar to
not cleared; not rid of objects or obstructions
"uncleared land"; "many cars were stuck in the snow on uncleared streets"