treacle

From Middle English triacle, partly from Old French triacle, and partly from Old English tyriaca, both from Late Latin triaca, tiriaca, late form of theriaca, ultimately from Ancient Greek θηριακή (thēriakḗ, “antidote”), feminine form of θηριακός (thēriakós, “concerning venomous beasts”), from θήρ (thḗr, “beast”). Doublet of theriacle, equivalent to theriac + -le.