Uncivilized; not having developed a modern or civilized society (often used of peoples, societies, or behaviors considered primitive).
植民地時代、人々はしばしば「未開の地」と呼ばれる地域に派遣された。
In the colonial era, people were often sent to regions called 'uncivilized lands.'
その小説は外部の視点から先住民を未開だと描いているが、現在では問題視される表現だ。
That novel depicts the indigenous people as uncivilized from an outsider's perspective, but today that expression is considered problematic.
彼は未開の習慣について学ぶために、現地の長老に話を聞いた。
He talked with local elders to learn about the traditional (so-called 'uncivilized') customs.
Undeveloped or unexplored (land, territory, or field); an area not yet developed or investigated.
その谷は未開のままで、道路も電気も通っていない。
That valley remains undeveloped; there are no roads or electricity.
研究チームは未開の領域を調査するため、調査費を申請した。
The research team applied for funding to investigate an unexplored field.
未開の海域で新種の生物が発見された。
A new species was discovered in an unexplored sea area.
Unbloomed (of a flower); not yet opened.
この蕾はまだ未開で、来週には咲くはずだ。
This bud is still unbloomed; it should open next week.
温室では未開の花を保護するために夜間の加温を行っている。
In the greenhouse they heat at night to protect unbloomed flowers.