Answer: deepened

AnswerCrossword Clue
DEEPENEDIntensified.
deepenedMake or become deep or deeper
deepened(of a weather system) Decrease in barometric pressure
deepenedDEEPEN, to make deep (extending far down from the surface)
DEEPENEDUsed a dredge
DEEPENEDGave more capacity to
DEEPENEDDug out a bit more
DEEPENEDGrew more intense.
DEEPENEDDarkened.
DEEPENEDBecame more obscure.
DEEPENEDGot lower
DEEPENEDGrew profound.
DEEPENEDBecame more intense
DEEPENEDExcavated further
DEEPENEDGot more complicated
DEEPENEDGrew, as friendship
DEEPENEDKept shoveling out
DEEPENEDDug out, perhaps
DEEPENEDIntensified