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Synonyms

soot

American  
[soot, soot] / sʊt, sut /

noun

  1. a black, carbonaceous substance produced during incomplete combustion of coal, wood, oil, etc., rising in fine particles and adhering to the sides of the chimney or pipe conveying the smoke: also conveyed in the atmosphere to other locations.


verb (used with object)

  • soots,
    present (3rd person singular)
  • sooted,
    past participle,  past
  • sooting
    present participle
  1. to mark, cover, or treat with soot.

soot British  
/ sʊt /

noun

  1. finely divided carbon deposited from flames during the incomplete combustion of organic substances such as coal

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (tr) to cover with soot

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
soot Scientific  
/ st /
  1. A black, powdery substance that consists mainly of carbon and is formed through the incomplete combustion of wood, coal, diesel oil, or other materials. Because it absorbs energy from sunlight rather than reflecting it, soot is believed to be a cause of global warming, especially when it settles on snow and ice, reducing their reflectivity. Soot particles in the air are a contributing factor in respiratory diseases.


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Etymology

Origin of soot

before 900; Middle English; Old English sōt; cognate with Old Norse sōt

Explanation

The powdery black stuff that's sometimes created when fuel burns is called soot. A chimney sweep's job is to clean all the soot and ash from inside a chimney. Soot is mostly made of carbon, and it forms when matter burns incompletely. Engines, burning coal, and house fires are all sources of soot, and soot is a major contributor to air pollution around the world. It's dangerous for people to breathe too much soot into their lungs. Soot comes from a Germanic root that literally means "what settles."

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Vocabulary lists containing soot

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.

See Examples For:

Soda cans covered in soot still sit on the shelves.

From The Wall Street Journal ● Oct. 4, 2026

Traditional ink was generally made from soot, water, and a binder such as gum Arabic.

From Science Daily ● Sep. 26, 2026

Dead pine needles and soot carpet the forest floor.

From The Wall Street Journal ● Aug. 31, 2026

But the prospect also carries environmental risks if increased traffic accelerates Arctic melting, with soot emissions that settle on the ice cap trapping heat from sunlight.

From Barron's ● Aug. 22, 2026

It looked as if the entire cavalry had trampled on him, for his filthy shirt was the color of soot.

From "When the Sea Turned to Silver" by Grace Lin

Last year in Ramadan he imposed midnight curfew on coffeehouses and other soots where revelers congregated until dawn.

From Time Magazine Archive

His experiments covered all sorts of pigments, such as lamp-blacks, tars, carbonized vegetable matters, soots of oils and fats, and the various carbonized animal substances.

From Moon-Face by Jack London

Their warnin' sound our bizness soots, But bust the thought o' Silent Boots!

From Punch, or the London Charivari, Vol. 104, April 1, 1893 by Sir F. C. (Francis Cowley) Burnand

He looks big; he paints himself histrionically; he soots his face; he has a masterful dog, nothing half so fearful as a wolf-dog or bloodhound; and he raises his own manes, poor, stridulous Struldbrugs.

From The Posthumous Works of Thomas De Quincey, Vol. 1 by Alexander H. (Alexander Hay) Japp

Yet though starved by the exhausted soil, and clogged by soots from innumerable chimneys, it remained majestic, finely decorative as some tree of metal, of age-old bronze roughened by a greenness of deep-eating rust.

From The Far Horizon by Lucas Malet

His design touch is about to turn the sooted, shut-down BlackHorn into Shelby Jean’s, which will soon be giving off warm and comfy vibes as a restaurant and pub.

From Washington Times ● Mar. 21, 2015

Squinting in the glare, 1,727 contestants sooted their sights with candles, tightened their slings, commenced firing at 5:50 a. m. over glistening grass.

From Time Magazine Archive

Some thought it was the edge of a huge and newly invented Nazi smoke screen blown in from the front, for London and the southeast British coast were also sooted.

From Time Magazine Archive

By the time we arrived there the snow had become drab and sooted, wet and heavy.

From "A Separate Peace" by John Knowles

It is a little cobbled byway, grimed with drifting smoke from the railway yards, littered with wind-blown papers and lined with small wooden and brick houses sooted almost to blackness.

From Mince Pie by Christopher Morley

The offensive production from Morant came on 12 of 19 sooting from the field and marked the ninth time in the past 10 games the All-Star guard reached the 30-point mark.

From Seattle Times ● Feb. 8, 2022

The night-watchman, Alfred Swanson, took care of this curious plant, which consisted of a battery of petroleum lamps that were forced to burn to the sooting point.

From Edison, His Life and Inventions by Frank Lewis Dyer

After that all had gone well—except for a plug sooting on number three cylinder and a halt for petrol about fifty miles outside London.

From Men of Affairs by Roland Pertwee

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