per ‧ il /ˈperəl, ˈperɪl/ BrE AmE noun
[ Date: 1200-1300 ; Language: Old French ; Origin: Latin periculum ]
1 . [uncountable] literary or formal great danger, especially of being harmed or killed
in peril
They put their own lives in peril to rescue their friends.
great/grave/serious peril
The economy is now in grave peril.
a voyage that was fraught with peril (=full of danger)
2 . [countable usually plural] literary formal a danger or problem in a particular activity or situation:
the perils posed by mountaineering
peril of
the perils of the sea
3 . do something at your peril used to say that what someone is intending to do is dangerous or could cause them problems:
Politicians ignore this issue at their peril.