In a manner that promotes good digestion or relates to healthy digestive function; in a way that aids normal stomach and intestinal activity.
Adverbial form created by adding '-ly' to eupeptic, following standard English grammar rules for converting adjectives into adverbs describing how something occurs.
This adverb is so rare that it basically only exists in 19th-century medical textbooks recommending foods be 'eupeptically prepared'—a word for a way of eating that nobody says anymore.
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