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

• bestir
• bestir oneself
• bestow
• bestowal
• bestower
• bestowment
• bestrew
• bestride
• bestseller
• bestubbled
• besuited
• bet
• bet on
• beta
• beta blocker
• beta blocker eyedrop
• beta cell
• Beta Centauri
• Beta Crucis
• beta decay
• beta endorphin
• beta globulin
• beta iron
• Beta Orionis
• beta particle