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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61. She's a poor/good security risk.
62. You're taking a big risk showing this to Kravis.
63. There is no risk of contagion.
64. Few medical procedures carry no risk of any kind.
65. Such a large investment inevitably entails some risk.
66. Obesity can increase the risk of heart disease.
67. The slight risk added zest to the experience.
68. That's a risk I'm not prepared to take.
69. They were willing to risk everything for their liberty.
70. The treatment carries a high risk of complications.
71. Cigarette smoking multiplies the risk of cancer.
72. He would prefer not to risk another embarrassing defeat.
73. Science has determined that the risk is very small.
74. I dare not risk it; it's too dangerous.
75. Having multiple partners increases your risk of sexual diseases.
76. The operation carries an element of risk.
77. We invest broadly to lessen the risk.
78. He was putting himself at risk.
79. The risk is as nothing compared to the gain.
80. Hitting any non-military targets would risk 'collateral damage'.
81. She is game for any risk.
82. Don't go putting yourself at risk.
83. This wire is a safety/fire risk.
84. Cigarette smoking is a risk factor for this disease.
85. The police took a calculated risk in releasing him.
86. There is a risk of passing the virus on.
87. All personal belongings are left at the owner's risk.
88. They may even risk losing their homes.
89. There is no risk to public health.
90. There is a degree of risk in any sport.