indefinable /in-di-fīˈnə-bl/

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

indefinˈableness noun

• tranquiller
• tranquillest
• tranquillisation
• tranquillise
• tranquillised
• tranquilliser
• tranquillisers
• tranquillises
• tranquillising
• tranquillisingly
• tranquillities
• tranquillity
• tranquillization
• tranquillize
• tranquillized
• tranquillizer
• tranquillizers
• tranquillizes
• tranquillizing
• tranquillizingly
• tranquilly
• tranquilness
• tranquilnesses
• trans
• trans-