unspellable

English

Etymology

From un- +‎ spellable.

Adjective

unspellable (not comparable)

1. Difficult or impossible to spell.
   • 1928, Shaun Leslie, The Skull of Swift: An Extempore Exhumation:

     His masters, the Houyhnhnms of the unspellable and unsayable name, were more than performing horses or uncultured squires.

   • 1992, Hayden Carruth, Suicides and Jazzers:

     Their children, with unpronounceable, unspellable names, came to school in tattered clothes, the boys in drab vests and the girls in more colorful ones.