decrease
/di-ˈkrēs/
verb
to grow progressively less (as in size, amount, number, or intensity)
to cause to decrease
Yearly sales decreased by five percent.
noun
the process of growing progressively less (as in size, amount, number, or intensity) : the process of decreasing
an amount of diminution : reduction
a decrease in productivity
idiom
becoming less in size, amount, number, etc. : decreasing
The number of college applications is on the decrease.