indigestible

[ in-di-jes-tuh-buh l, -dahy- ]

/ ˌɪn dɪˈdʒɛs tə bəl, -daɪ- /

not digestible; not easily digested.

Origin of indigestible

From the Late Latin word indīgestibilis, dating back to 1520–30. See in-³, digestible

in·di·gest·i·bil·i·ty, in·di·gest·i·ble·ness, noun in·di·gest·i·bly, adverb

An adult would have to eat about eight castor beans—after first removing the indigestible skin—to die.

Ricin: Five Things to Know About It |Caitlin Dickson |April 17, 2013 |DAILY BEAST
Can you imagine Blair, or even Obama, saying something quite so indigestible (as distinct, of course, from unpalatable)?

What Cameron Is Up Against |Tunku Varadarajan |May 12, 2010 |DAILY BEAST
The ordinary boiled cabbage is an indigestible "windy" vegetable, and should never be eaten.

Food Remedies |Florence Daniel
Leave off the flour or meal, and by the time the meat is cooked it will be dry and hard as pine bark and as indigestible.

The Wild Turkey and Its Hunting |Edward A. McIlhenny

Some were nearly intact, while others were fragmentary and represented by only a few of the more durable and indigestible parts.

Life History and Ecology of the Five-lined Skink, Eumeces fasciatus |Henry S. Fitch
Some of its most common causes—over-eating and the eating of indigestible food—are especially vices of men.

A System of Practical Medicine By American Authors, Vol. II |Various
He is a whole-hogger even to the most indigestible bit of crackling.

Punch, or the London Charivari, Vol. 156, Feb. 5, 1919 |Various

indigestible

/ (ˌɪndɪˈdʒɛstəbəl) /

incapable of being digested or difficult to digest

difficult to understand or absorb mentally an indigestible book

indigestibility or indigestibleness, noun indigestibly, adverb