Old English wad "woad," also the blue dye made from its leaves, from Proto-Germanic *waido- (cognates: Danish vaid, Old Frisian wed, Middle Dutch wede, Dutch wede, Old High German weit, German Waid "woad"), perhaps cognate with Latin vitrium "glass" (see vitreous). Formerly much cultivated; since superseded by indigo. French guède, Italian guado are Germanic loan-words.
实用例句
1. A blue dyestuff can be obtained from the woad plant.
菘蓝属植物可以造蓝色染料.
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2. Old World genus of annual to perennial herbs: woad.