numskull or numbskull /numˈskul/ (informal)

A blockhead

numˈskulled adjective

• unrespective
• unrespited
• unresponsive
• unresponsively
• unresponsiveness
• unrest
• unrestful
• unrestfulness
• unrestfulnesses
• unresting
• unrestingly
• unrestingness
• unrestingnesses
• unrestored
• unrestrainable
• unrestrained
• unrestrainedly
• unrestraint
• unrestraints
• unrestricted
• unrestrictedly
• unrests
• unretarded
• unretentive
• unretouched