1
general::
1. In danger, as in Their house's location on the San Andreas Fault puts them at risk in the next major earthquake. [c. 1900] 2. Legally responsible to pay for loss or damage, as in If he can't keep up with the insurance premiums, he is at risk for any liability claims on the property. [Late 1700s]
American Heritage Idioms
2
general::
Phrase(s): *at risk
in a situation where there is risk or hazard; in danger. (*Typically: be ~; put someone or something ~.) • I refuse to put my family’s welfare at risk by quitting my job. • Your whole future is at risk if you don’t stop smoking.
McGrawhill's American Idioms And Phrasal Verbs