2 Timothy 2:17

“And their word will eat as doth a cancer, etc.] Or “gangrene”, which gnaws and feeds upon the flesh, inflames and mortifies as it goes, and spreads swiftly, and endangers the whole body; and is therefore to be speedily taken notice of, and stopped. It is better rendered “gangrene”, as in the marginal reading, than “cancer”. “The word “gangrene” is Greek f7, and is derived by some authors from the Paphlagonian “gangra”, a goat; it being the character of a goat to browse the grass all around without shifting. It is more correct, perhaps, to derive it from the Greek word graw, grainw, “manduco”, “consumo”, I eat, I consume. The “gangrene” is a disease in the flesh of the part which it corrupts,…”

“will eat--literally, "will have pasture." The consuming progress of mortification is the image. They pretend to give rich spiritual pasture to their disciples: the only pasture is that of a spiritual cancer feeding on their vitals. canker--a "cancer" or "gangrene." Hymenaeus--(See on Ti1 1:20). After his excommunication he seems to have been readmitted into the Church and again to have troubled it.”

“And their word - The word, or the discourses of those who love vain and idle disputations. Will eat as doth a canker - Margin, “gangrene.” This word - γάγγραινα gangraina - occurs nowhere else in the New Testament. It is derived from γραιω graiō, γραινω grainō, to devour, corrode,” and means “gangrene” or “mortification” - the death of a part, spreading, unless arrested, by degrees over the whole body. The words rendered “will eat,” mean “will have nutriment;” that is, will spread over and consume the healthful parts. It will not merely destroy the parts immediately affected, but will extend into the surrounding healthy parts and destroy them also. So it is with erroneous doctrines. They…”

“And their word - If they go on, will be mischievous as well as vain, and will eat as a gangrene. 2 Timothy 2:18”

“2:17 Hymenaeus was earlier teamed with Alexander (1 Tim 1:20); both of them were still wreaking havoc (2 Tim 4:14-15). • Philetus was Hymenaeus’s new accomplice.”

“their word: Nah 3:15; Jam 5:3 canker: or, gangrene Hymenaeus: Ti1 1:20 2 Timothy 2:18”