underwater 2022.12.06 underwaterとは 意味・定義・例文 Adjective 形容詞 1. designed to be used under water 水中用の an underwater camera Adjective, Adverb 形容詞, 副詞 1. happening, done, or situated below the surface of water 水中にいる, 水中で起こる|水中に, 水中で swim underwater