indescribable

/ˌɪndɪˈskraɪbəbəl/
adjective
  1. So extreme or unusual that it is impossible to describe in words.
    • The noise from the concert was indescribable, like a wall of sound.
    • The beauty of the sunset was indescribable.
    • She felt an indescribable joy when she saw her family after years apart.
Antonyms
What does "indescribable" mean? | whatsthatwordmean | whatsthatwordmean