Synonym: chance, endanger, expose, gamble, hazard, imperil, jeopardize, venture. Antonym: safety. Similar words: brisk, risky, disk, rise, perish, Irish, arise, wrist. Meaning: [rɪsk] 
n. 1. a source of danger; a possibility of incurring loss or misfortune 2. a venture undertaken without regard to possible loss or injury 3. the probability of becoming infected given that exposure to an infectious agent has occurred 4. the probability of being exposed to an infectious agent. v. 1. expose to a chance of loss or damage 2. take a risk in the hope of a favorable outcome.
n. 1. a source of danger; a possibility of incurring loss or misfortune 2. a venture undertaken without regard to possible loss or injury 3. the probability of becoming infected given that exposure to an infectious agent has occurred 4. the probability of being exposed to an infectious agent. v. 1. expose to a chance of loss or damage 2. take a risk in the hope of a favorable outcome. 
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181. You'd be crazy to risk your money on an investment like that!
182. We've been advised not to risk travelling in these conditions.
183. All the people who know this secret represent a security risk.
184. My heart flew up into my mouth when I saw the risk that the child was taking.
185. Environmentalists say there is a high risk of pollution from the landfill site.
186. Intravenous drug users are at particular risk of contracting the disease.
187. Some people are prepared to risk imprisonment for what they believe.
188. You can take a gamble on getting a higher rate of interest by putting it into high - risk shares.
189. To put it baldly, I can't afford to take the risk.
190. Research has confirmed that the risk is higher for women.
191. Often it was easier to go along with her rather than risk an argument.
192. Being even moderately overweight increases your risk of developing high blood pressure.
193. At the risk of sounding ungrateful, I must refuse your offer.
194. The restaurant has been refurbished — it was found to be a fire risk.
195. The doctor must not allow the patient to be put at risk.
196. We don't want to risk the possibility of losing all our money.
197. I decided to join in with him to take the risk.
198. An entrepreneur is more than just a risk taker. He is a visionary.
199. Refugees in the camps are short of food and at risk from foul water.
200. At the risk of being repetitive,(http://sentencedict.com/risk.html) I will say again that statistics are only a guide.
201. You could never eliminate risk, but preparation and training could attenuate it.
202. Increased levels of fat in the diet could heighten the risk of cancer.
203. They deserve to be punished for putting passengers at risk.
204. Research has shown that hormone replacement therapy can reduce the risk of fracture by 50 to 60 per cent.
205. This is certainly a theoretical risk but in practice there is seldom a problem.
206. At the risk of repetition , it is worth mentioning again that young children are particularly vulnerable to accidents in the home.
207. Restricted circulation of the report will reduce the risk of leaks outside the ministry.
208. Companies that are not market-driven risk falling behind the competition.
209. The benefit of an x-ray far outweighs the minutely increased risk of cancer.
210. Laboratory tests gave conclusive proof that the meat presents no risk to human health.