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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211. At the risk of sounding rude, don't you think you'd better change for the party?
212. The policy hazarded the islands and put the lives of the inhabitants at risk.
213. Rather than risk breaking up his marriage he told his wife everything.
214. Doctors believe only a tiny number of people are at risk.
215. Their lack of training could put members of the public at risk.
216. There is a real risk of injury in sports such as climbing.
217. The element of risk gave added zest to the adventure.
218. Many people are willing to take that risk in order to protect their families.
219. For the people inside the tunnel there was a serious risk of flooding or a cave-in.
220. I couldn't take the risk of leaving him alone even for a short time.
221. The consensus is that risk factors have an accumu-lative effect.
222. Fire-fighters risk life and limb every day in their work.
223. The trial was kept secret because of the risk of public disorder.
224. They risk losing their homes because they can no longer keep up the repayments.