1) Digested with difficulty 2) Disgusting 3) Flatulent 4) Heavy 5) Inedible 6) Nondigestible 7) Not digestible 8) Not easily digested 9) Poisonous 10) Revolting 11) Tough as old boots 12) Undigested 13) Uneatable 14) Unfit for human consumption 15) Unpalatable Found on https://www.crosswordclues.com/clue/indigestible
• (a.) Not digestible; not readily soluble in the digestive juices; not easily convertible into products fitted for absorption. • (a.) Not digestible in the mind; distressful; intolerable; as, an indigestible simile. Found on http://thinkexist.com/dictionary/meaning/indigestible/
In`di·gest'i·ble adjective [ Latin indigestibilis : confer French indigestible . See In- not, and Digest .] 1. Not digestible; not readily soluble in the digestive juices; not easily convertible into products fitted for absorption. 2. Not digestible in th... Found on http://www.encyclo.co.uk/webster/I/44