малоосво́енный

adjective

1.
little-developed, undeveloped (of land), largely untouched
Э́то малоосво́енный райо́н Се́вера.
This is a little-developed region of the North.
Typically of regions, land or natural resources that have hardly been opened up for use.
2.
not yet fully mastered, insufficiently tried out
Заво́д рабо́тает по малоосво́енной техноло́гии.
The plant works with a technology it has not yet fully mastered.
Of production methods, technologies or skills that are still new to those using them.

Declension