1. Lack of knowledge or mental capacity; idiocy; foolishness 
2. An idiom; a form, mode of expression, or signification, peculiar to a language

Derived forms: idiotisms

• root canal
• root cap
• root celery
• root cellar
• root climber
• root crop
• root for
• root hair
• root on
• root out
• root rot
• root system
• root vegetable
• root word
• rootage
• rootbound
• rooted
• rooter
• rooter skunk
• rooting
• rooting reflex
• rootle
• rootless
• rootlet
• roots