sea
UK: siː | US: siː
n. the expanse of salt water that covers most of the earth's surface
n. a large inland body of water (e.g., the Caspian Sea)
n. the movement or turbulence of the ocean; waves
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The word "sea" traces back to Old English sǣ, meaning "a lake, pool, or expanse of water." It shares roots with Proto-Germanic saiwiz and is distantly related to Latin saevus ("fierce"), possibly reflecting the untamed nature of large bodies of water. Unlike many modern English words, "sea" has retained its compact, monosyllabic form since ancient times, making it a core vocabulary item resistant to decomposition.
The ship vanished somewhere in the vast sea.
We spent our holiday by the Black Sea.
Heavy seas delayed the ferry’s departure.
Seagulls circled above the churning sea.
Ancient explorers feared sailing beyond the known seas.