underdeveloped
adjective
uk/ˌʌndədɪˈveləpt/ us/-dɚ-/ ECONOMICS
having little or no modern industry, few modern services, and a weak economy:
Many of these regions are very underdeveloped.
not as advanced or powerful as possible or expected:
They have a good brand name but it is underdeveloped.
The reason for the underdeveloped state of the country's capital markets is decades of economic mismanagement.
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developed