indigestible

in- +‎ digestible

indigestible (comparative more indigestible, superlative most indigestible)

1. Difficult or impossible to digest.
2. (by extension) Difficult to accept; unpalatable.

indigestible (plural indigestibles)

1. Anything that is difficult to digest.
   • 1872, James Parton, The Life of Horace Greeley

     "Take a cruller, any way," said she, handing him a cake-basket containing a dozen or so of those unspeakable, Dutch indigestibles.

• indigestible at OneLook Dictionary Search

indigestible (plural indigestibles)

1. (obsolete) indigestible

• indigerible

• “indigestible” in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014.