woad

n [U] (a) blue dye formerly obtained from a plant of the mustard family 菘蓝（旧时取自菘蓝植物的染料）. (b) this plant 菘蓝（植物）.

without regard to, without so much as, withstand, withy, witless, witness, witness-box (Brit) (US `witness-stand), witter, witticism, wittily, wittiness, wittingly, witty, wives, wizard, wizardry, wizen, wizened, wk, WO, wobble, wobbliness, wobbly, wodge, woe, woebegone, woeful, woefully, wok, woke, woken, wolf, wolf-cub, wolf-whistle, wolfhound, wolfish, wolfram, woman, woman-like, womanhood,