The Collaborative International Dictionary
Undigestible
Undigestible \Un`di*gest"i*ble\, a. Indigestible.
Wiktionary
undigestible
a. 1 (alternative spelling of indigestible English) 2 Chemically impossible to digest.
Usage examples of "undigestible".
A stray dog turd, red with meaty undigestible food coloring, is embossed with the RadiKS logo, a mirror image of which is printed on the tread of each spoke.