What does "ununderstandable" mean?

Not understandable; that cannot be understood.

What is a synonym for "ununderstandable"?

Common synonyms include: incomprehensible.

adj

adj ·Rare ·Advanced level

Adjective

1
Not understandable; that cannot be understood.
"Cameron was for closing the discussion as useless and ununderstandable."

"Cameron was for closing the discussion as useless and ununderstandable."

From un- + understandable.