asleep beef-witted benumbed blear-witted blockish blunt blunt-witted callous dead deadened dense dim dim-witted doltish dopey dull dull of mind dull-headed dull-pated dull-witted dumb fat-witted gross-headed heavy hebetudinous impassible imperceptive impercipient insensate insensible insensitive insentient numb numbed obdurate obtuse slow slow-witted sluggish thick thick-brained thick-headed thick-pated thick-skinned thickheaded thickskulled unfeeling unfelt unperceptive wooden