uneducated
uninformed
a novice at
a stranger to
awkward
benighted
blankminded
boorish
brainless
callow
crude
disaccustomed
discourteous
dumb
empty
empty-headed
foolish
fresh
gauche
green
green as grass
groping
gross
headless
ignoramous
ill-mannered
illiterate
immature
impolite
in the dark
inane
incognizant
inept
inexperienced
ingenuous
innocent
insensate
irrational
know-nothing
lackbrained
lean-minded
lean-witted
lowbrow
mindless
naive
nescient
new to
not bright
oblivious
of little brain
ignorable
ignoramus
ignorance
ignore
blind
careless
idle
indifferent
lazy
miserable
poor
stupid