dug-out

n 1 (also dug-out canoe) canoe made by hollowing out a tree trunk 独木舟. 2 rough covered shelter, usu for soldiers, made by digging in the earth 掩蔽部, 防空洞（通常为士兵用的）.

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, 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, dump,