Answer:

infest

Answer	Crossword Clue
INFEST	Overrun
INFEST	Invade in great numbers
INFEST	Overrun en masse, as ants

INFEST	Take over
INFEST	Overrun, as with locusts
INFEST	Be parasitic
INFEST	Fill (an area), like termites
INFEST	Overrun, as with pests
INFEST	Plague
INFEST	"The cares that ... the day . . . "
INFEST	Swarm all over.

INFEST	Overrun.
INFEST	Overrun, as vermin
INFEST	Unpleasantly overrun
INFEST	Overrun, like a bunch of cockroaches
INFEST	Overrun, troublesomely
INFEST	Overrun, in a troublesome way
INFEST	Overrun, as bugs
INFEST	Overrun en masse, as rats