1. Retarded in intellectual development
   - backward, half-witted, feebleminded

See also: retarded, slow-wittedness

• idle pulley
• idle talk
• idle wheel
• idle words
• idleness
• idler
• idler pulley
• idling
• idly
• Ido
• idocrase
• idol
• idol worship
• idol worshiper
• idolater
• idolatress
• idolatrous
• idolatrously
• idolatry
• idolisation
• idolise
• idolised
• idoliser
• idolization
• idolize