The need to eat when you are starving and sleep when you are exhausted are examples of exigencies.
The special characteristics of each are to be seen partly in the skill and genius of their makers, and partly in the exigencies of the site and the available materials.
Of course it is to be noted that the edge of the cutting tool is never allowed to trespass upon a line which the exigencies of the design require to be solid.
He lived at a time when the exigencies of state seemed to require the peculiar talents which he possessed.
In all probability he was neither the one nor the other, but a man of great ambition who, indifferent to religious considerations, made good use of the exigencies of the time.
The constitution of the little state was dictated by Napoleon, and, subject to the exigencies of war, was on the French model.