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un‧der‧de‧vel‧oped

1 a country, area etc that is poor and where there is not much modern industry [↪ developing country]
underdeveloped country/region etc
2 not having grown or developed as much as is usual or necessary :
a baby born with underdeveloped kidneys
a baby born with underdeveloped kidneys —underdevelopment noun [uncountable]
