soot

[soot, soot]
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)
2.
to mark, cover, or treat with soot.

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

soot·less, adjective
soot·like, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
soot (sʊt) [Click for IPA pronunciation guide]
 
n
1.  finely divided carbon deposited from flames during the incomplete combustion of organic substances such as coal
 
vb
2.  (tr) to cover with soot
 
[Old English sōt; related to Old Norse, Middle Low German sōt, Lithuanian sódis, Old Slavonic sažda, Old Irish sūide]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Soot is one of our favorite verbs.
So is absquatulate. Does it mean:
to chew (food) slowly and thoroughly.
to flee; abscond:
Etymonline
Word Origin & History

soot
O.E. sot, from P.Gmc. *sotam "soot" (cf. O.N. sot, O.Du. soet, N.Fris. sutt), lit. "what settles," from PIE *sodo- (cf. O.C.S. sazda, Lith. suodziai, O.Ir. suide, Bret. huzel "soot"), from base *sod-/*sed- "to sit" (see sedentary).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
soot   (st)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The little cave has been rendered a soot hole by millennia of offertory candles.
The smoke is made up of tiny particles of soot and ash.
It may be a grain of dust, a speck of soot from a forest fire, a fungal
  spore-or a particle of industrial pollution.
The steel mill has not been entirely cleaned up, but it no longer spews soot
  over everything.
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