Answer:

exacerbate

Answer	Crossword Clue
EXACERBATE	Make worse
EXACERBATE	Inflame
EXACERBATE	Worsen

EXACERBATE	Irritate.
EXACERBATE	Embitter.
EXACERBATE	Embitter

Crossword

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