Answer:

VITIATE

Answer	Crossword Clue
VITIATE	Spoil
VITIATE	Impair the quality of.
VITIATE	Impair.

VITIATE	Render ineffective.
VITIATE	Weaken.
VITIATE	Debase
VITIATE	Corrupt
VITIATE	Impair
VITIATE	Impair the quality of

Crossword

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