confiding
unsuspecting
unsuspicious
artless
bluff
blunt
born yesterday
candid
childlike
confident
credulous
dependent
depending
direct
doting
easily taken in
easy of belief
fond
frank
guileless
gullible
incautious
inclined to believe
infatuated
ingenu
ingenuous
innocent
naive
open
openhearted
outspoken
overconfiding
overcredulous
overtrustful
overtrusting
plain
reliant
relying
simple
simplehearted
simpleminded
sincere
single-hearted
single-minded
superstitious
trustful
trusty
uncritical
undoubting
unguarded
adjusting
busting
disgusting
dusting
encrusting
entrusting
gusting
lusting
mistrusting
readjusting
rusting
thrusting