exposure to injury, loss, or destruction; grave risk; jeopardy; danger

They faced the peril of falling rocks.

something that causes or may cause injury, loss, or destruction.

to expose to danger; imperil; risk.

noun

safeness , safety , security

noun

cause for alarm , double trouble , endangerment , exposure , hazard , insecurity , jeopardy , liability , menace , openness , pitfall , risky business , uncertainty , vulnerability , imperilment , risk , adventure , charybdis , crisis , danger , endanger , instability , threat , trap

verb

imperil , jeopardize , menace , risk , threaten