undigesting
adjEtymology From un- + digesting.
1
That does not digest.
- You first taught me that the doctrine was a live thing, and not a mere formula to be swallowed by the undigesting reason, and from the time that I learnt from you that a Father meant a real Father, a Son a real Son, and a Holy Spirit a real Spirit, who was really good and holy.1877, Charles Kingsley, Frances Eliza Grenfell Kingsley, Charles Kingsley: His Letters and Memoires of His Life, page 215:
2
Not undergoing digestion.
- During sleep, normal digestion is delayed or arrested altogether; and the sleeplessness may be directly ascribed in these cases to the presence of undigesting food, which is often indigestible and usually acid.1895, Sidney Martin, Functional & organic diseases of the stomach, page 179: