(EKS-ih-jen-see), noun
A condition or problem of some urgency, such that when it arises, it requires an immediate effort to alleviate or solve it.
“We should never despair, our Situation before has been unpromising and has changed for the better, so I trust, it will again. If new difficulties arise, we must only put forth New Exertions and proportion our Efforts to the EXIGENCY of the times.” – George Washington