PERIL

[noun] [slightly formal] - great danger, or something that is very dangerousI never felt that my life was in peril. [U]The journey through the mountains was fraught with peril (= full of dangers). [U]Teenagers must be warned about the perils of unsafe sex. [C]The situation is full of perils and pitfalls (= things that can go wrong). [C](slightly formal) If you tell someone to do something at their peril, you are warning them that this is a very dangerous thing to do.We underestimate the destructiveness of war at our peril.