distrustful
on guard
on one's guard
on your guard
shy
upon one's guard
Argus-eyed
Machiavellian
Machiavellic
Pyrrhonic
Scotch
acute
agnostic
all ears
all eyes
arch
artful
astute
aux aguets
cagey
calculating
canny
careful
cautious
chary
circumspect
clever
considerate
crafty
cunning
custodial
cute
deceitful
deep
deep-laid
designing
diplomatic
discreet
disinclined to believe
disposed to doubt
doubtful
doubting
dubious
eagle-eyed
feline
foxy
from Missouri
frugal
gingerly
guarded
warier
wariest
alert
anxious
apprehensive
attentive
reluctant
resolute
suspicious
uneasy
watchful
Arie
Azeri
Barrie
Barry
Berri
Berry
Bury
Canary
Carey
Carrie
Cary
Cheri
Cherry
Derry
Garry
Gary
Gerri
Gerry
Glengarry
Guarneri
Harry
Jeri
Jerri
Jerry
Kari
Kerri
Kerry
Larry
Mary
Merry
Metairie
Neri
Parry
Perry
Sheri
Sherri
Sherry
Sperry
Teri
Terri
Terrie
Terry
aerie
airy
arie
ary
barre
barry
berry
bury