[ig-zas-er-beyt, ek-sas-]
verb (used with object), exacerbated, exacerbating.
to increase the severity, bitterness, or violence of (disease, ill feeling, etc.); aggravate.
to embitter the feelings of (a person); irritate; exasperate.

1650–60; < Latin exacerbātus (past participle of exacerbāre to exasperate, provoke), equivalent to ex- ex-1 + acerbātus acerbate

exacerbatingly, adverb
exacerbation, noun
unexacerbated, adjective
unexacerbating, adjective

exacerbate, exasperate.

1. intensify, inflame, worsen.

1. relieve, soothe, alleviate.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
exacerbate (ɪɡˈzæsəˌbeɪt, ɪkˈsæs-)
1.  to make (pain, disease, emotion, etc) more intense; aggravate
2.  to exasperate or irritate (a person)
[C17: from Latin exacerbāre to irritate, from acerbus bitter]

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

1580s, from L.L. exacerbationem (nom. exacerbatio), from L. exacerbare "exasperate, irritate," from ex- "thoroughly" + acerbus "harsh, bitter," from acer "sharp, keen" (see acrid).

1650s, from L. exacerbat-, pp. stem of exacerbare (see exacerbation). Related: Exacerbated; exacerbating.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

exacerbation ex·ac·er·ba·tion (ĭg-zās'ər-bā'shən)
An increase in the severity of a disease or in any of its signs or symptoms.

ex·ac'er·bate' v.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Near-term negative consequences include exacerbation of unemployment among migrant populations.
Another is the exacerbation of social tensions in what is a perilously unequal country.
Gross exacerbation of social inequality is a grave social harm.
An acute exacerbation of asthma is commonly referred to as an asthma attack.
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