The antonyms of *acclivities* are *declivity*, *descent*, and *downgrade*. These words describe the opposite direction or slope of a hill, mountain, or any elevated surface. Use these words in outdoor activities, aviation, and business contexts to convey the appropriate meaning.

등산객들은 가파른 *declivity*를 내려갈 때 조심해야 했습니다.

ハイカーは急な*崖の*崇拝*を下るときは注意しなければなりませんでした。

The hikers had to be careful while descending the steep *declivity*.

비행기는 공항 활주로를 향해 *하강*을 시작했습니다.

飛行機は空港の滑走路に向かって*降下*を開始しました。

The airplane started its *descent* towards the airport runway.

회사의 이익은 전염병이 경제에 미치는 영향으로 인해 *다운그레이드*되었습니다.

同社の利益は、パンデミックの経済への影響により*格下げ*されました。

The company's profits took a *downgrade* due to the pandemic's impact on the economy.