ad·verse

[ad-vurs, ad-vurs]
adjective
1.
unfavorable or antagonistic in purpose or effect: adverse criticism.
2.
opposing one's interests or desire: adverse circumstances.
3.
being or acting in a contrary direction; opposed or opposing: adverse winds.
4.
opposite; confronting: the adverse page.

Origin:
1350–1400; Middle English < Anglo-French, Old French advers < Latin adversus hostile (past participle of advertere), equivalent to ad- ad- + vert- turn + -tus past participle suffix, with -tt- > -s-

ad·verse·ly, adverb
ad·verse·ness, noun
un·ad·verse, adjective
un·ad·verse·ly, adverb
un·ad·verse·ness, noun

adverse, averse (see usage note at the current entry).


1. hostile, inimical, unfriendly. 2. unfavorable; unlucky, unfortunate; disastrous, calamitous, catastrophic. See contrary.


1–3. favorable.


The adjectives adverse and averse are related both etymologically and semantically, each having “opposition” as a central sense. Adverse is seldom used of people but rather of effects or events, and it usually conveys a sense of hostility or harmfulness: adverse reviews; adverse winds; adverse trends in the economy. Related nouns are adversity and adversary: Adversities breed bitterness. His adversaries countered his every move. Averse is used of persons and means “feeling opposed or disinclined”; it often occurs idiomatically with a preceding negative to convey the opposite meaning “willing or agreeable,” and is not interchangeable with adverse in these contexts: We are not averse to holding another meeting. The related noun is aversion: She has a strong aversion to violence. Averse is usually followed by to, in older use occasionally by from.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Adverse is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a chattering or flighty, light-headed person.
Collins
World English Dictionary
adverse (ˈædvɜːs, ædˈvɜːs) [Click for IPA pronunciation guide]
 
adj
1.  antagonistic or inimical; hostile: adverse criticism
2.  unfavourable to one's interests: adverse circumstances
3.  contrary or opposite in direction or position: adverse winds
4.  Compare averse (of leaves, flowers, etc) facing the main stem
 
[C14: from Latin adversus opposed to, hostile, from advertere to turn towards, from ad- to, towards + vertere to turn]
 
ad'versely
 
adv
 
ad'verseness
 
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

adverse
late 14c., from O.Fr. avers (Mod.Fr. adverse), from L. adversus "turned against," thus "hostile," pp. of advertere, from ad- "to" + vertere "to turn" (see versus).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
We're learning about what a group of people can do under adverse circumstances.
You should save not only for retirement, but also for adverse income shocks.
Insufficient measures to permit an escape from the adverse feedback loop
  between sovereign debt and bank debt.
Nuclear radiation release to the public in adverse moment is the hyper critical
  control point.
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