being

Being is an act of a condition being true for a thing.

Yes, that description uses itself twice (is an act, being true). I'm trying.

For the concept that being as a noun usually refers to, check thing, or maybe entity or agent.

• X is Y
  • X is usually a form, structure, mode, etc.
  • Y is usually a condition
  • is is:
    • claiming that Y is true of X