As a Noun: 1. The possibility that something unpleasant will happen. English = risk. 2. Something you do that is new and difficult so involves the risk of failure. English = venture. As a Verb or Adjective: 1. Of an activity or action, to be dangerous or likely to fail. English = (be) risky , (be) hazardous, (be) perilous. 2. To be unsure about something. English = (be) doubtful. 3. To be in a condition or situation where something unpleasant might happen to you. English = (be) at risk. 4. To be weak and easily hurt physically or emotionally. English = (be) vunerable. 5. 6. To do something that involves a risk of failure because it is new and different. English = venture.