thick-headedness

"You don't understand," groaned Pixley, with an inclination to weep over the foreigner's thick-headedness.

A murrain on his thick-headedness; fair Sir, I cannot rightly tell what he doth mean.

The experience of a few days ago might have taught me that, one would think, but I was dull to thick-headedness.

I bit my lip, and the colour came into my face from provocation at my own evident thick-headedness.

In fact it is the sort of domineering thick-headedness that never fails to produce disloyalty.