n.
  - a situation involving exposure to danger. 
▸the possibility that something unpleasant will happen.
 - a person or thing causing a risk or regarded in relation to risk:
 a fire risk.
 
v.
 expose to danger or loss. 
▸act in such a way as to incur the risk of.
 ▸incur risk by engaging in (an action).
 
  Phrase
  
    - at one's 
(own)
 risk
 taking responsibility for one's own safety or possessions.  - run 
(or take)
 a risk 
(or risks)
 expose oneself to the possibility of something unpleasant occurring. 
   
  Etymology
  C17: from Fr. risque (n.), risquer (v.), from Ital. risco ‘danger’ and rischiare ‘run into danger’.