dug

n udder; teat （牛羊等的）乳房, 乳头.

duckweed, duct, ductile, ductility, ductless gland, dud, dude, dudgeon, duds, due, due to, duel, duellist, duenna, duet, duff, duffer, duffle (also duffel), duffle bag, duffle-coat, dug-out, duke, dukedom, dulcet, dulcimer, dull, dullard, dullness, dully, duly, dumb, dumb show, dumb waiter, dumb-bell, dumbfound (also dumfound), dumbly, dumbness, dumdum, dummy, dummy run,