wheat: [OE] Wheat is etymologically the ‘white’ grain. The word comes from prehistoric Germanic *khvaitjaz (source also of German weizen, Dutch weit, Swedish hvete, and Danish hvede), which was derived from a variant of the base *khwīt-, source of English white. It alludes to the ‘white’ flour produced by grinding the grain. => white[wheat etymology, wheat origin, 英语词源]