thickskull

English

Etymology

From thick +‎ skull.

Noun

thickskull (plural thickskulls)

1. (archaic) A dullard; a blockhead.
   • c. 1828, Thomas Hood, The Three Brothers:

     the dullwitted pair began to think of redeeming their turbans, and in spite of the entreaties of Agib, being very obstinate, as such thickskulls usually are, they went forth on that errand.

   • 1859, William Swinton, Rambles Among Words: Their Poetry, History and Wisdom:

     And how often do we hear persons stigmatized as 'numskulls' and 'thickskulls' and 'blockheads' — though why they should be block-heads, I know not […]