candid
heart-to-heart
naive
naïf
open
undistorted
artless
bluff
blunt
bold
born yesterday
broad
brusque
budding
callow
childlike
confiding
cullible
deceivable
deludable
dewy
direct
downright
dupable
easy
explicit
exploitable
fair
fair and square
foolable
forthright
frank
frankhearted
free
free-speaking
free-spoken
free-tongued
freeborn
generous
genuine
green
growing
guileless
gullible
high-minded
hoaxable
honest
honorable
hoodwinkable
amiable
boyish
disinterested
lovable
manly
unaffected
womanly
disingenuous
strenuous