decelerator

de·cel·er·ate

[dee-sel-uh-reyt] verb, de·cel·er·at·ed, de·cel·er·at·ing.
verb (used with object)
1.
to decrease the velocity of: He decelerates the bobsled when he nears a curve.
2.
to slow the rate of increase of: efforts to decelerate inflation.
verb (used without object)
3.
to slow down: The plane decelerated just before landing.

Origin:
1895–1900; de- + (ac)celerate

de·cel·er·a·tion, noun
de·cel·er·a·tor, noun
non·de·cel·er·a·tion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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decelerate (diːˈsɛləˌreɪt) [Click for IPA pronunciation guide]
 
vb
to slow down or cause to slow down
 
[C19: from de- + accelerate]
 
deceler'ation
 
n
 
de'celerator
 
n

00:10
Decelerator is always a great word to know.
So is interrobang. Does it mean:
the offspring of a zebra and a donkey.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
decelerate (diːˈsɛləˌreɪt) [Click for IPA pronunciation guide]
 
vb
to slow down or cause to slow down
 
[C19: from de- + accelerate]
 
deceler'ation
 
n
 
de'celerator
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

decelerate
1899, from de- + (ac)celerate.
Online Etymology Dictionary, © 2010 Douglas Harper
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