I. -ˈprüvd adjective
Date: 1602
obsolete : not reproved or admonished
II. adjective
Date: 1665
: not improved: as
a. : not tilled, built on, or otherwise improved for use
unimproved land
b. : not used or employed advantageously
unimproved opportunities
c. : not selectively bred for better quality or productiveness