Meaningair raid shelter · dugout · trenchOn'yomiコウ · ゴウKun'yomiほりCommon compounds (5)堀 ほりcanal; ditch外堀 そとぼりouter moat (of a castle)壕 ごうunderground air-raid shelter; dugout内堀 うちぼりinner moat; moat within the castle walls防空壕 ぼうくうごうair-raid shelter; bomb shelter