stupid
Boeotian
asinine
beef-brained
beef-witted
beetleheaded
blockheaded
blockish
bovine
chumpish
cloddish
cowish
crass
dense
doltlike
dull
dullard
dumb
duncical
duncish
fat
fatheaded
gross
ineducable
klutzy
lumpish
oafish
opaque
sottish
thick
unteachable
wrongheaded
biocompatible
deep-lined
dull-witted
goatlike
guiltiest
hard-set
lackluster
maladroit
moisture-proof
mountain-path
pointless...what
raven-haired
semiprofessional
shepherd-boy
slit-eyed
slow-paced
unapprehensive
unhandy
will-less