1: γάγγραινα
(Strong's #1044 — Noun Feminine — gangraina — gang'-grahee-nah )

"an eating sore," spreading corruption and producing mortification, is used, in 2—Timothy 2:17 , of errorists in the church, who, pretending to give true spiritual food, produce spiritual gangrene (AV, "canker," RV, "gangrene").