https://www.thefreedictionary.com/Heaven+forfend https://www.thefreedictionary.com/Heaven+forfend It's a somewhat more archaic form of "heaven forbid" as I und

https://www.thefreedictionary.com/Heaven+forfend https://www.thefreedictionary.com/Heaven+forfend It's a somewhat more archaic form of "heaven forbid" as I understand it. I think the word "forfend" is mostly heard in this idiom these days.