Late Middle English brad, variant of brod(d), from Old Norse broddr (“spike, shaft”), from Proto-Germanic *bruzdaz (compare Old English brord, Old High German brort), from Proto-Indo-European *bʰrusdʰos (compare Welsh brath (“sting, prick”), Albanian bredh (“fir-tree”), Lithuanian bruzdùklis (“bridle”), Czech brzda (“brake”). Doublet of prod.