1. (of especially persons) lacking sense or understanding or judgment
   - nitwitted, senseless, witless

See also: stupid

• double-jointed
• double-magnum
• double-park
• double-prop
• double-propeller plane
• double-quick
• double-reed instrument
• double-space
• double-spaced
• double-spacing
• double-team
• double-tongued
• double-u
• doubled
• doubleheader
• doubler
• doubles
• doublespeak
• doublet
• doublethink
• doubleton
• doubletree
• doubling
• doubloon
• doubly