DictionaryRoot: siu
Old French
siu
fat, tallow
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noun
suet
SOO-it/ˈsuːɪt/
Hard fat from around an animal’s kidneys and loins, used in cooking or bird feed.
Etymology
Suet probably comes from a diminutive of Old French siu, “fat” or “tallow.” The English word names specifically the solid fat found in the torsos of cattle and sheep.