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

• peripatetic
• peripateticism
• Peripatidae
• Peripatopsidae
• Peripatopsis
• peripatus
• peripeteia
• peripetia
• peripety
• peripheral
• peripheral device
• peripheral nervous system
• peripheral vision
• peripherally
• periphery
• periphrasis
• periphrastic
• periphrastically
• Periplaneta
• Periplaneta americana
• Periplaneta australasiae
• periplasm
• periplasmic space
• Periploca
• Periploca graeca