to decrease; to be reduced; to grow less; to abate
to reduce; to lessen; to cut down; to mitigate; to diminish
to subtract; to deduct; to take off
ボランティアの数は年々減ずる。
The number of volunteers decreases year by year.
嵐の勢いは徐々に減じた。
The storm's intensity gradually abated.
インフレで旧通貨の価値は減じていった。
The value of the old currency diminished due to inflation.