未み開かい地ち

noun

undeveloped land; backward region; savage land

Refers to land that is not yet developed or civilized, often with a connotation of being primitive or barbaric. Can be used historically or in modern contexts for remote, undeveloped areas.

• その探たん検けん家かはアマゾンの未み開かい地ちを調ちょう査さした。

  The explorer surveyed the undeveloped areas of the Amazon.

• かつてこの地ち域いきは未み開かい地ちと呼よばれていた。

  This region was once called a savage land.