swell

SWEL /swɛl/
nounverbB2SATIELTSTOEFL
neutraltechnical

A series of surface gravity waves created by distant weather systems that travel long distances across the ocean without breaking.

Unlike local wind waves, which are choppy and disorganized, a swell consists of smooth, orderly waves that have traveled far from their storm of origin, carrying immense energy.

The story behind the word. The word 'swell' traces back to the Old English 'swellan', meaning to grow larger or fill up. For centuries, mariners used it to describe the rising of the sea without breaking, recognizing that these deep-ocean undulations were the echoes of distant, unseen storms.

Word relationships

  • surge: A surge is a sudden, powerful forward movement of water, whereas a swell is a sustained, rhythmic wave pattern.
  • billow: A billow is a large, swelling mass of water or smoke, often used poetically, while swell is a precise oceanographic term.
  • calm: Calm refers to a completely still and flat water surface with no wave energy.
  • flatness: Flatness denotes the absolute absence of waves or swell activity in the ocean.

Commonly confused with

  • wave: A wave is any single disturbance of water, whereas a swell is specifically a series of mature, wind-generated waves traveling across deep water.

Word family

  • swelling (noun): An abnormal enlargement or a temporary rise in water level.
  • swelled (verb): Past tense of swell; expanded or increased in size.

Collocations

  • ground swell
  • ocean swell
  • heavy swell
  • swell direction

Idioms & expressions

  • swell with pride

Example sentences

  • "The ocean swell is very lazy, but it is also very powerful, lifting the ship with slow, irresistible strength." A classic account of Pacific seafaring describing the relentless motion of the ocean.
  • "Forecasters are tracking a massive ground swell originating from a low-pressure system near the Aleutian Islands." A surf forecast predicting optimal conditions for an upcoming weekend competition.

Memory hook

Think of the ocean's chest 'swelling' with a deep breath as a massive wave rises up from the depths. A swelling wave from a distant storm.

When not to use

Do not use 'swell' to describe small, localized ripples on a lake or the immediate splashes caused by a passing boat.

Fun facts

  • Ocean swells can travel thousands of miles across open water without losing their energy, only releasing it when they finally hit a shallow coastline.

Related words

break, barrel

Explore more words

tsunami, turbulence, swift, Surfboard, Breeze, riot

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