Answer:

crumble

Answer	Crossword Clue
CRUMBLE	Fall to pieces
CRUMBLE	Go to pieces
CRUMBLE	Break up

CRUMBLE	Break into bits
CRUMBLE	Perish.
CRUMBLE	Fall to pieces.
CRUMBLE	Fall apart

Crossword

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