stupid
a stranger to
abnormal
apish
asinine
asleep
batty
bedlamite
befooled
beguiled
bereft of reason
besotted
blind to
brainless
brainsick
buffoonish
caught napping
cockeyed
crackbrained
cracked
crazed
crazy
credulous
daffy
daft
dazed
dead to
deaf to
deluded
demented
deprived of reason
deranged
disoriented
distraught
dizzy
doting
dumb
empty-headed
fatuitous
fatuous
featherbrained
featherheaded
flaky
flighty
fluttery
fond
fool
foolheaded
foolish
frivolous
fuddled
bedridden
contemptible
defenseless
delude
friendless
half-witted
idiotic
illiterate
impotent
mindless
senseless
sinful
speechless
thoughtless
toothless
unable
ungrateful
unprincipled
unreasoning
unthinking