beet n.

plant growing wild in northern Europe, cultivated for use of its succulent root as food and for sugar extraction, Old English bete "beet, beetroot," from Latin beta, which is said to be of Celtic origin. Common in Old English, then lost till c. 1400. Still usually spoken of in plural in U.S. A general West Germanic borrowing, cognates: Old Frisian bete, Middle Dutch bete, Old High German bieza, German Beete.