disquiet
worrit
worryingly
send shivers down someone's spine
fuss
worry someone sick
get grey hair from
eat away at
afraid
piggle
concern
gnaw
fantigue
begruntle
oppress
fear
trouble
demon
eat
crap oneself
cloud
freak out
unsettle
geek out
on one's mind
preoccupy
pain
sadden
besiege
unease
bemoan
faunch
unhinge
get one's bowels in an uproar
perturb
look to
anticipate
anxiousness
look for
disorder
tie oneself in knots
worried
distract
cark
give someone grey hair
surprise
worry
sweat
feel-bad
spook
dread
worriment
distressed
fret
pother
panic
scary
anxious
fray
uncomfortable
unnerve
hobgoblin
grate
bugbear
willies
doxophobia
fettle
fever
make someone's hair stand on end
gnawingly
bother
solicitous
scarecrow
bug out
disturbing
concerned
deject
clouded
sweat blood
make someone's blood run cold
care
suspense
heated
solicitude
fash
make someone's jaw drop
provoke
haunt
hairy