What does "indescribableness" mean?

The quality of being indescribable.

What is a synonym for "indescribableness"?

Common synonyms include: indescribability.

noun

noun ·Rare ·Advanced level

Noun

1
The quality of being indescribable. uncountable
2
The quality or state of being impossible, or very difficult to describe. wordnet

From indescribable + -ness.