IPA: //ˈfiːdˌstʌf//
KK: /fidˌstʌf/
Material used as food for animals, especially livestock.
Farmers often buy feedstuff to ensure their animals have enough nutrition.
Feedstuff → It is formed from "feed" (from Old English "fēdan", meaning to give food) and "stuff" (from Old French "estofe", meaning material or substance). The word "feedstuff" refers to material or substance used for feeding animals.
Think of 'feeding' animals with 'material' — that's what feedstuff means.
No commonly confused words.