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risk

[risk] /rɪsk/
noun
1.
exposure to the chance of injury or loss; a hazard or dangerous chance:
It's not worth the risk.
2.
Insurance.
  1. the hazard or chance of loss.
  2. the degree of probability of such loss.
  3. the amount that the insurance company may lose.
  4. a person or thing with reference to the hazard involved in insuring him, her, or it.
  5. the type of loss, as life, fire, marine disaster, or earthquake, against which an insurance policy is drawn.
verb (used with object)
3.
to expose to the chance of injury or loss; hazard:
to risk one's life.
4.
to venture upon; take or run the chance of:
to risk a fall in climbing; to risk a war.
Idioms
5.
at risk,
  1. in a dangerous situation or status; in jeopardy:
    families at risk in the area of the weakened dam.
  2. under financial or legal obligation; held responsible:
    Are individual investors at risk for the debt part of the real estate venture?
6.
take / run a risk, to expose oneself to the chance of injury or loss; put oneself in danger; hazard; venture.
Origin
1655-1665
1655-65; < French risque < Italian risc(hi)o, of obscure origin
Related forms
risker, noun
riskless, adjective
unrisked, adjective
Synonyms
1. venture, peril, jeopardy. 3. imperil, endanger, jeopardize. 4. chance.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for run a risk

risk

/rɪsk/
noun
1.
the possibility of incurring misfortune or loss; hazard
2.
(insurance)
  1. chance of a loss or other event on which a claim may be filed
  2. the type of such an event, such as fire or theft
  3. the amount of the claim should such an event occur
  4. a person or thing considered with respect to the characteristics that may cause an insured event to occur
3.
at risk
  1. vulnerable; likely to be lost or damaged
  2. (social welfare) vulnerable to personal damage, to the extent that a welfare agency might take protective responsibility
4.
(Austral, informal) no risk, an expression of assent
5.
take a risk, run a risk, to proceed in an action without regard to the possibility of danger involved in it
verb (transitive)
6.
to expose to danger or loss; hazard
7.
to act in spite of the possibility of (injury or loss) to risk a fall in climbing
Derived Forms
risker, noun
Word Origin
C17: from French risque, from Italian risco, from rischiare to be in peril, from Greek rhiza cliff (from the hazards of sailing along rocky coasts)
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
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Word Origin and History for run a risk
risk
1661, risque, from Fr. risque, from It. risco, riscio (modern rischio), from riscare "run into danger," of uncertain origin. The Anglicized spelling first recorded 1728. Sp. riesgo and Ger. Risiko are It. loan-words. The verb is from 1687; risky first recorded 1826.
Online Etymology Dictionary, © 2010 Douglas Harper
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run a risk in Medicine

risk (rĭsk)
n.

  1. The possibility of suffering a harmful event.

  2. A factor or course involving uncertain danger, as with smoking or exposure to radiation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Idioms and Phrases with run a risk
Also, run the risk. Be subjected to danger, as in Hiding anything from customs means running a risk that you'll be caught, or Without the right postage and address, this package runs the risk of being lost. [ Mid-1600s ]
In addition to the idiom beginning with
risk
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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