indefinable /in-di-fīˈnə-bl/

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

• stuffiest
• stuffily
• stuffiness
• stuffinesses
• stuffing
• stuffing box
• stuffing boxes
• stuffings
• stuff it
• stuffs
• stuff them
• stuff up
• stuffy
• stuff you
• stuggier
• stuggiest
• stuggy
• stull
• stulls
• stulm
• stulms
• stultification
• stultifications
• stultified
• stultifier