indefinable /in-di-fīˈnə-bl/

1. That cannot be defined
2. Hard to identify or describe

indefinˈableness noun

indefinˈably adverb

• improvable
• improvableness
• improvablenesses
• improvably
• improve
• improved
• improvement
• improvements
• improver
• improvers
• improves
• improve the occasion
• improvidence
• improvidences
• improvident
• improvidently
• improving
• improvingly
• improvisate
• improvisated
• improvisates
• improvisating
• improvisation
• improvisational
• improvisations