thickheaded; insensitive; dull; thick-skinned
stupid; dim-witted; dense; dull; obtuse; slow
thickheaded; slow-witted; phlegmatic; slow (of one's movements); sluggish
becoming dull; slowing down
slow; clumsy; slow-witted; stupid
slow; clumsy; slow-witted; stupid
stupidity; dull person; dullness
sharp or blunt; bright or foolish
obtuse (of the shape of a leaf); rounded
luck, steadfastness and patience (the three keys to achieving success)