noun (f) loophole <engnote>Slit in a wall for light, air, or shooting through</engnote> I added an engnote here as I read the DIEC definition for 'espitllera', understood exactly what it referred to but didn't know what the English was (other than 'slit in a castle wall for shooting arrows through'). A Google search led me to an English list of 'Castle Terminology' (can you believe such a thing exists?) and the entry 'Loophole: slit in wall for light, air, or shooting through'. As I was unaware of this term before today I can but assume that this will be the case for at least some other English speakers using Dacco.