dull-witted

adjective

dull-wit·​ted ˈdəl-ˈwi-təd 

: mentally slow : dim-witted

He tried to teach her how to pronounce his last name with a French twirl, and when her tongue could not master it he accused her of being dull-witted.

—James A. Michener

Theirs was the perennial problem of quick-witted subjects under the governance of dull-witted administrators.

—Declan Kiberd

dull-wittedly adverb

staring dull-wittedly out the window

dull-wittedness noun

Most people agree that life is better than death. Health is better than sickness. … Knowledge is better than ignorance. Intelligence is better than dull-wittedness. Happiness is better than misery.

—Marian L. Tupy

Word History

First Known Use

14th century, in the meaning defined above