underdeveloped

Misollar

Algeria is developing its underdeveloped regions.
I found the supporting characters rather underdeveloped.
The transnationality of the European blogosphere is still underdeveloped.
Algeria still suffers from the legacy of an underdeveloped banking system.

sifat adjective

Immature and not fully developed
Having a low level of economic productivity and technological sophistication
Of a film that has had insufficient development before being fixed

fe’l verb

To develop insufficiently.

Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.