ineffability

/ɪnˌɛfəˈbɪləti/
noun
  1. The quality of being too great, extreme, or sacred to be expressed in words.
    • The ineffability of the sunset left the entire group speechless.
    • The mystic spoke of the ineffability of the divine presence during meditation.
    • Many poets have tried to capture the ineffability of love, but words always fall short.