dullness

/ˈdʌl.nəs/

DɅL · nəs (2 syllables)

English Noun

Definition

The quality of being slow of understanding things.

From dull + -ness.

"If to raise malicious smiles at the infirmities or misfortunes of those who have never injured us be the province of wit or Humour, Heaven grant me a double Portion of Dullness—"
"dullness of autumn"
"dullness of sight, or of hearing"