未み開かい発はつ

noun

undeveloped; backward; unexplored

Used for countries, regions, resources, or fields that are not yet developed or exploited. Often carries a slightly formal or news-report tone. 'Backward' can sound dated or pejorative; prefer 'undeveloped' or 'less developed' in neutral contexts.

• 未み開かい発はつの地ち域いきには豊ゆたかな自し然ぜんが残のこっている。

  Undeveloped areas still have abundant nature.