obtusity

obtuse +‎ -ity, from Latin obtusitas.

obtusity (countable and uncountable, plural obtusities)

1. obtuseness
   • 1848 December, “Vanity Fair--and Jane Eyre”, in London Quarterly Review, Elizabeth: Rigby:

     Some ladies would have thought it high time to leave the Squire alone with his chestnut tree; or, at all events, unnecessary to keep up that tone of high-souled feminine obtusity which they are quite justified in adopting if the gentlemen will not speak out—but Jane again does neither.

Much less common than standard obtuseness.

• obtuseness

• “obtusity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “obtusity”, in OneLook Dictionary Search.