cautious
Argus-eyed
Olympian
all ears
all eyes
aloof
apprehensive
armed
arrested
aux aguets
backward
bashful
blank
bridled
buried
cagey
calculating
canny
careful
chary
chilled
chilly
circumspect
cloaked
closed
cold
concealed
considerate
constrained
controlled
cool
copyrighted
covered
covert
curbed
custodial
defended
deliberate
detached
discreet
disinclined to believe
disposed to doubt
distant
eagle-eyed
expressionless
forbidding
frigid
bombarded
carded
discarded
disregarded
larded
regarded
retarded
unguarded