arrowroot
noun/ˈærəʊruːt/
/ˈærəʊruːt/
[uncountable]- a plant whose roots can be cooked and eaten or made into a type of flour, used especially to make sauces thick; the flour itselfWord Originlate 17th cent.: alteration of Arawak aru-aru (literally ‘meal of meals’) by association with arrow and the noun root, the tubers being used to absorb poison from arrow wounds.
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arrowroot