dug-out

dug-out
/ˈdʌg aut; `dʌɡˌaʊt/ 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）.

牛津英汉双解词典