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Definitions

deep-sea

[deep-see] / ˈdipˈsi /

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marine adj.
marine/maritime adj.
maritime adj.
nautical adj.
nautical/naval adj.
thalassic adj.

ADJECTIVE

marine

Synonyms

STRONGEST

aquatic coastal maritime naval saltwater seagoing

STRONG

littoral nautical oceanic sea seafaring seashore seaside shore

WEAK

Neptunian abyssal hydrographic natatorial navigational ocean-going oceanographic pelagic

Antonyms

WEAK

freshwater

ADJECTIVE

marine/maritime

Synonyms

WEAK

Neptunian abyssal aquatic coastal hydrographic littoral natatorial nautical naval navigational oceangoing oceanic oceanographic of the sea pelagic saltwater sea seafaring seagoing seashore seaside shore

ADJECTIVE

maritime

Synonyms

STRONGEST

aquatic marine naval oceangoing seafaring seagoing

WEAK

oceanic pelagic

ADJECTIVE

nautical

Synonyms

STRONGEST

maritime navigational seafaring

STRONG

marine

WEAK

abyssal aquatic boating cruising naval navigating oceangoing oceanic oceanographic pelagic rowing sailing sailorly salty sea-loving seagoing ship thalassic yachting

ADJECTIVE

nautical/naval

Synonyms

WEAK

abyssal aquatic boating cruising marine maritime navigating navigational oceangoing oceanic oceanographic pelagic rowing sailing sailorly salty sea-loving seafaring seagoing thalassic yachting

ADJECTIVE

thalassic

Synonyms

WEAK

Neptunian abyssal aquatic coastal hydrographic littoral maritime natatorial nautical naval navigational oceangoing oceanic oceanographic of the sea pelagic saltwater sea seafaring seagoing seashore seaside shore

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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deep-sea

“I’ve always been fascinated by deep-sea animals,” Pereira said.

From Los Angeles Times ● Sep. 5, 2026

Pacific island nations are divided on whether deep-sea mining will deliver economic windfalls, or environmental catastrophe.

From Barron's ● Aug. 6, 2026

The data included carbon isotope records, measurements of phosphorus accumulation in deep-sea sediments, and a newer iodine-to-calcium method for reconstructing ancient ocean oxygen levels.

From Science Daily ● Jul. 16, 2026

Conservationists say this and other extraordinary deep-sea snails, limpets, mussels and clams could be threatened by plans to mine valuable minerals from the deep seabed.

From BBC ● Jul. 9, 2026

I stand there shaking from head to foot, moved to the deep-sea depths of my being, like a creature thrown into audience with thunder.

From "Grendel" by John Gardner

deep-sea

Example Sentences

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Related Words