underwater

/ˌʌndəwˈɔːtɐ/

/ˈəndɝˌwɔtɝ/

underwater

describing something that is placed, operating, or occurring below the surface of water, or designed to function in such an environment

synonyms : submerged

growing or remaining under water

synonyms : subaquatic

Examples

1. REd algae adds a burst of color to the underwater landscape.

2. My uncle and I went snorkeling and saw beautiful tropical fish underwater.

3. The athlete dived into the pool and swam under to complete the underwater portion of the race.

4. Swimming requires controlled breathing techniques to stay underwater.