Gangrene

wiktionary

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From French gangrène, from Latin gangraena, from Ancient Greek γάγγραινα(gángraina, “gangrene”).

etymonline

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gangrene (n.)

"putrefaction or necrosis of soft tissues," 1540s, cancrena, from Latin gangraena (Medieval Latin cancrena), from medical Greek gangraina "an eating or gnawing sore," literally "that which eats away," a dissimilated, reduplicated form of gran- "to gnaw," from PIE root *gras- "to devour" (see gastric).