1. Not easy to believe
   - incredibly, improbably, unbelievably

See also: implausible

• industrialise
• industrialised
• industrialism
• industrialist
• industrialization
• industrialize
• industrialized
• industrially
• industrious
• industriously
• industriousness
• industry
• industry analyst
• indwell
• indweller
• indwelling
• inebriant
• inebriate
• inebriated
• inebriation
• inebriety
• inedible
• ineducable
• ineffability
• ineffable