Word
undersea
Phoneticsun·der·sea, stress on the third syllable
US/ˌəndɝˈsi/
UK/ˌʌndəsˈiː/
Definition
adj. located or happening below the surface of the sea. You use this to describe things like cables, animals, or structures that are deep in the ocean.
adj. situated or occurring beneath the surface of the sea. Often used to describe infrastructure, marine life, or geological features found in the ocean depths.
Examples
“The divers explored the undersea world of coral reefs.”
“Engineers installed a high-speed undersea cable to connect the two islands for better internet service.”
“The documentary provides a fascinating look at the undersea ecosystem, revealing how life thrives in the extreme pressure and darkness of the deep ocean floor.”
Examples
simple
“The divers explored the undersea world of coral reefs.”
contextual
“Engineers installed a high-speed undersea cable to connect the two islands for better internet service.”
complex
“The documentary provides a fascinating look at the undersea ecosystem, revealing how life thrives in the extreme pressure and darkness of the deep ocean floor.”
Real-World Examples
“The agency located the shallow undersea quake near Flores island.” “Separately, Australia’s tsunami warning centre said the undersea earthquake will have “no tsunami threat to the Australian mainland, islands or territories”.” Etymology
From under- + sea.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
- Frequency
- Occasional
- Level
- B2 · Upper Intermediate
- Updated
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QR code
englishreference.com/q/undersea