Sevier

Hi.
What does 'sevier' mean in:
"When demand of product and services exceeds the supply of the product in the economy it is known as wage or demand-pull inflation. This scarcity of good and services pushes the general price level upward. This trend follow the common law of demand as demand increases so the prices level and situation prevail until supply adjust accordingly. In the time of emergencies like during or after wartime the affect is more Sevier."?

Thanks!