1. Lacking official approval
   - unaccredited, unlicenced [Brit, non-standard]

See also: unauthorised [Brit], unauthorized

• instantly
• instar
• instate
• instauration
• instead
• instep
• instigant
• instigate
• instigation
• instigative
• instigator
• instil
• instill
• instillation
• instillator
• instilling
• instillment
• instilment
• instinct
• instinctive
• instinctive reflex
• instinctively
• instinctual
• instinctually
• institute