indefinable /in-di-fīˈnə-bl/

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

indefinˈableness noun

• manifested
• manifestible
• manifesting
• manifestly
• manifestness
• manifestnesses
• manifesto
• manifestoed
• manifestoes
• manifestoing
• manifestos
• manifests
• manifold
• manifolded
• manifolder
• manifolders
• get the feel of
• get the finger out
• get the goods on
• get the hang of
• get the heave
• get the heave-ho
• get the law on
• get the message
• get the mitten