1. (noun) a stupid mistake

• betise
• folly
• foolishness
• imbecility

1. (noun) a poor ability to understand or to profit from experience

• backwardness
• mental retardation
• retardation
• slowness
• subnormality
• craziness
• folly
• foolishness
• madness
• denseness
• dumbness
• slow-wittedness
• dullness
• obtuseness
• vacuousness

1. (noun) a poor ability to understand or to profit from experience

• inability

2. (noun) a stupid mistake

• error
• fault
• mistake

1. (noun) a poor ability to understand or to profit from experience

• intelligence

1. (noun) a poor ability to understand or to profit from experience

• stupid
• stupid
• unintelligent