Boeotian
asinine
beef-brained
beef-witted
blockish
bovine
chumpish
cloddish
cowish
crass
dense
doltish
dullard
dumb
duncical
duncish
fat
gross
ineducable
lumpish
oafish
opaque
sottish
stupid
thick
unteachable
wrongheaded
klutz