Answer:

deepened

Answer	Crossword Clue
DEEPENED	Got lower
DEEPENED	Intensified
DEEPENED	Dug out, perhaps

DEEPENED	Kept shoveling out
DEEPENED	Grew, as friendship
DEEPENED	Got more complicated
DEEPENED	Excavated further
DEEPENED	Became more intense
DEEPENED	Grew profound.
DEEPENED	Intensified.
DEEPENED	Became more obscure.

DEEPENED	Darkened.
DEEPENED	Grew more intense.
DEEPENED	Dug out a bit more
DEEPENED	Gave more capacity to
DEEPENED	Used a dredge

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.