increasing daily; increasing day by day
foodstuffs left out for many days
彼の自信は日増しに増えた。
His confidence increased day by day.
水不足への懸念が日増しに高まっている。
Concern about the water shortage is growing daily.
山々の紅葉は日増しにその色を深めていった。
The autumn leaves on the mountains deepened in color day by day.