Most our rarities have been found out by casual
emergency. --Glanvill.
2. An unforeseen occurrence or combination of circumstances
which calls for immediate action or remedy; pressing
necessity; exigency.
To whom she might her doubts propose, On all
emergencies that rose. --Swift.
A safe counselor in most difficult emergencies.
--Brougham.
Syn: Crisis; conjuncture; exigency; pinch; strait; necessity.