— deepener , n. — deepeningly , adv.
/dee"peuhn/ , v.t. , v.i.
1. to make or become deep or deeper: Larger ships will be able to navigate the river after the main channel is deepened. The shadows deepened toward late afternoon.
2. Meteorol. to decrease in atmospheric pressure: a deepening cyclone.
[ 1595-1605; DEEP + -EN 1 ]