submersible
adjective/səbˈmɜrsɪbəl/
Frequency rank: #15,927 of 20,003 in the WORDED list (wordfreq data)
Meaning
designed to operate or be used underwater

Example sentence
The crew used submersible equipment to explore the shipwreck on the ocean floor.
Synonyms & related words
- underwater
- subaquatic
- waterproof
- aquatic
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