black-water rafting

Noun

uncountable

An informal sport in which participants use tyre inner tubes as rafts and ride them on rivers through caves

Japanese Meaning

タイヤの内輪を筏として利用し、河川や洞窟内の水路を下るカジュアルなスポーツ

Our guide warned us that black-water rafting through the cavern's narrow passages would be both exhilarating and surprisingly chilly.

ガイドは、洞窟の狭い通路をインナーチューブで下る洞窟チュービングはスリル満点で思ったより冷えるだろうと私たちに警告しました。

Sense（1）

An informal sport in which participants use tyre inner tubes as rafts and ride them on rivers through caves