(a.) Like a block; deficient in understanding; stupid; dull.

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